A Brief History of Snow Globes

iStock/Wavebreakmedia
iStock/Wavebreakmedia

The way Erwin Perzy's family tells it, if Thomas Edison had designed a better light bulb, Perzy would never have invented the snow globe. 

Back in 1900, Erwin Perzy I was working in Vienna as a fine instruments mechanic when a surgeon came to him with a problem. Although the surgeon had electric light bulbs installed in his operating theater, the newly invented product didn't cast great light. He wanted to know if Perzy could improve on the dim bulbs and make them brighter. So he got to work. As Perzy hunted for inspiration, he noticed that shoemakers had stumbled into an interesting trick: By filling glass globes with water and placing them in front of candles, they created tiny spotlights in their shops.

When Perzy tried the trick with a lightbulb, he discovered the brightness wasn't improved. But what if he added something to the water that the light could bounce off of? Perzy started with white semolina flakes, used in baby food at the time. “He poured [them] into the glass globe, and [they] got soaked by the water and floated very slowly to the base of the globe,” his grandson, Erwin Perzy III, told the BBC. “This effect reminded him of snowfall.”

Inspiration struck: What if he used his technical expertise to create a tiny diorama in his snowy little world? Perzy made a miniature replica of the Basilica of the Birth of the Virgin Mary in Mariazell, Austria, placed it in his water-filled globe, sealed it, and mounted it to a gypsum base that he painted black. And voila—the first snow globe was born.

At least, that's the story Austrians like to peddle. But what about the snow globes that appeared a few decades before, in another country entirely?

PARISIAN BEGINNINGS

According to Nancy McMichael, a snow globe collector profiled in a 1997 article in The New York Times, the first snow globes were showcased at the 1878 Paris Universal Exposition by a local glassware firm. She isn't the only one who noticed. As described in the (exhaustive) reports of the U.S. Commissioners to the exposition, the water-filled globes each featured a little man holding an umbrella, and "a white powder which, when the paper weight is turned upside down, falls in an imitation of a snow storm."

The next iteration of the snow globe came in 1889, again at the Paris Universal Exposition. As McMichael writes in her book Snowdomes, this time the globe—which was the work of an enterprising souvenir vendor—featured a tiny ceramic version of the just-unveiled Eiffel Tower, and the whole ball fit in the palm of a hand. (An example of the globe lives at the Bergstrom-Mahler Museum of Glass in Wisconsin.)

“The rest,” McMichael wrote, “is history.”

But it’s interesting history, one that reflects a larger story about how items were manufactured and sold, and what made them popular in the 20th century.

Though Perzy—who patented his globe in 1900—didn’t invent the snow globe, he and his brother are responsible for catapulting the souvenir into the position of tchotchke primacy it holds today. Seizing on the invention, the pair opened a shop, Original Wiener Schneekugel Manufaktur, in Vienna. Today, that shop is still run by an Erwin Perzy—his grandson, Erwin Perzy III—and they still make snow globes, containing Austrian tourist attractions, animals, and Christmas themes, in the same Vienna workshop where the original Perzy practiced his craft.

But it's easy to forget that Perzy was also an artisan. His items were painstakingly hand-crafted. So while his snow globes (also called “snow domes” or “snow weights”) were exquisite and popular, they were neither cheap nor widespread. For the snow globe to go global, it needed to be mass-produced—and that's how America got into the business. 

A MASS-MARKET MEMENTO

In 1927, a Pittsburgh man named Joseph Garaja filed his application for a patent for a liquid-filled novelty paperweight that improved upon previous designs; the design he presented and later sold was a fish floating in sea grass. But it wasn't Garaja’s under-the-sea theme that impressed the industry. His real contribution to snow globe manufacturing was in pioneering the now-obvious method of assembling the globes underwater to ensure they were entirely filled. This, David Bear wrote for the Pittsburgh Post-Gazette in 2000, “revolutionized” the snow globe industry: “They went from being expensive mementos individually crafted by skilled artisans to items that could be cheaply mass-produced and sold.”

Which they were: In the 1930s, William Snyder, a New Jersey entrepreneur, began selling souvenir globes for $1, around $18 now. Snyder would later earn two patents related to snow globes and his company, Atlas Crystal Works, would become a major manufacturer of the items.

But the big boom for snow globes came, as it did for so many other things in the 20th century, after a little product placement. In the 1940 Ginger Rogers vehicle Kitty Foyle, young Kitty launches a flashback scene when she shakes a snow globe containing the figure of a girl on a sled. According to Connie Moore and Harry Rinker in Snow Globes: A Collector’s Guide to Selecting, Displaying and Restoring Snow Globes, sales of the keepsakes skyrocketed 200 percent after the film came out.

The next year, Orson Welles’s Citizen Kane also used a snow globe—containing a little log cabin and made by Perzy’s company—for that monumental opening scene: When publishing titan Charles Kane dies with the word “Rosebud” on his lips, and the snow globe he's holding drops from his hand and shatters. The 1940s also witnessed the dawning of a new era in advertising ubiquity, and brands began making snow globes to advertise their products. Other popular themes included World War II iconography, such as a soldier at attention.

By the 1950s, innovation in plastics and injection-molding meant that snow globes could be made even more cheaply. Even the “snow” that floats around inside the globe, called “flitter” in the business, could be made from plastics—no need to use marble, bone chips, or ground rice anymore (mass-produced plastic glitter, which was allegedly invented in 1934, became part of the snow globe story only later). The water filling the globes was also frequently mixed with glycol, to make the snow fall more slowly, although sometimes it was mixed with far more lethal substances. At least one manufacturer, McMichael told The New York Times, began mixing antifreeze into the water to keep the globes from freezing and cracking during shipping. Stories of children becoming ill after drinking the water from snow globes sometimes made headlines, including one about children who became seriously sick after drinking snow globe water taken directly from polluted Hong Kong Bay.

Despite those stories, the industry continued to grow. Four major companies in America continued to produce snow globes of varying quality and subject including souvenirs, but also holiday globes and novelty gifts. It was a similar landscape in Europe, with a few manufacturers dominating the snow globe scene.

By the 1980s, snow globes were still a staple of the gift industry, but they’d also become the epitome of kitsch—probably because everyone and everything from Disney’s Bambi to the Lone Ranger to Niagara Falls and the White House could be put under glass and forced to endure frequent and bewildering snowstorms. But what does the market look like today? 

A GLOBE FOR EVERYONE

Oddly enough, snow globes remain big business. There is a sizable collector's market for both antique and novelty domes. And Erwin Perzy III’s company is still healthy. The Vienna shop produces upwards of 200,000 snow globes a year, and that’s just a small part of the market. It’s perhaps a mark of how familiar a form a snow globe is, and what innocent—almost saccharine—kitsch they’re meant to be that they can be so gleefully perverted, as this collection of weird, macabre, and wonderful snow globes demonstrates.

So this holiday, consider the humble snow globe as a gift for someone you love. But if you do buy in, remember not  to bring your snow globe on a plane (unless it’s smaller than a tennis ball and can fit entirely into a Ziploc bag). And always adhere to these words from collector McMichael: “'No matter how thirsty you are, no matter how desperate, never, ever drink the water from a snow dome.'”

When Theodore Roosevelt's Antique Gun Was Stolen From Sagamore Hill

Wikimedia Commons // Public Domain
Wikimedia Commons // Public Domain

Shortly before hitting the battlefield on July 1, 1898, Theodore Roosevelt had a decision to make. He was about to lead a volunteer cavalry known as the Rough Riders in the Battle of San Juan Heights in Santiago, Cuba, during the Spanish-American War. In protecting both his life and the lives of his men during combat, what sidearm should he choose?

Roosevelt, an avowed arms enthusiast, had an arsenal in his personal collection as well as numerous firearms issued by the U.S. military. The gun he chose to holster on his waist was a Colt Model 1895 .38 caliber double-action revolver with six shots, a blue barrel, and a checkered wood grip. While it may not have been the most formidable weapon at his disposal, it was the most emotionally resonant. The gun, a gift from his brother-in-law, had been retrieved from the wreck of the U.S. battleship Maine, whose sinking had claimed the lives of 266 men and helped usher in the war. He considered the gun a tribute to the sailors and Marines lost in the tragedy.

Now it had become an instrument of that war. In the conflict, Roosevelt aimed his revolver at two opposing soldiers. He missed one. The other was struck—and the wound was fatal. “He doubled up as neatly as a jackrabbit,” Roosevelt later wrote.

Just a few years later, Roosevelt would be president of the United States. The gun remained in his possession until his death in 1919, and eventually came into the care of Sagamore Hill, his onetime home and later a historic site. The Colt occupied a place of honor in the property’s Old Orchard Museum, behind glass and next to the uniform that he wore during the charge.

In April of 1990, a museum employee walked past the display and noticed something unusual. The Colt was gone. The weapon used by the 26th president to kill a man would go missing for 16 years, recovered only under the most unusual of circumstances.

“This poor gun has been through a lot,” Susan Sarna, the museum’s curator, tells Mental Floss. “It was blown up on the Maine, sunk to the bottom, resurrected, goes to San Juan Hill, comes here, then gets stolen—twice.”

 

According to a 2006 article in Man at Arms magazine by Philip Schreier [PDF], the senior curator at the National Rifle Association’s National Firearms Museum, the Colt has indeed had a hectic life. Manufactured in Hartford, Connecticut, in March 1895, the firearm (serial number 16,334) was delivered from the factory to the U.S. government and wound up on board the USS Maine when the ship was first commissioned in September of that year. The gun was considered ship property and remained on board until February 15, 1898, when the Maine exploded in Havana, Cuba. Many blamed the Spanish for the explosion, and hundreds of men lost their lives.

At the time, Roosevelt’s brother-in-law, William S. Cowles, was heading the U.S. Naval Station. He and his team were sent to the site to inspect the scene. Divers retrieved bodies and other items, including the Colt. Knowing Roosevelt—at the time the Assistant Secretary of the Navy under President William McKinley—was fond of weapons and a genial warmonger, Cowles gave it to him as a gift. While it was perfectly functional, it's clear Cowles intended the Colt to serve to honor the memory of those who had died.

The Colt revolver that once belonged to Theodore Roosevelt is pictured on display at Sagamore Hill
Roosevelt's Colt revolver on display at Sagamore Hill.
Courtesy of Sagamore Hill National Historic Site

Roosevelt later took it into battle, using it to shoot at enemy forces. (He would earn a posthumous Medal of Honor in 2001 for his actions that day.) Shortly after, the weapon was inscribed to represent its participation in two exceptional events. On one side of the handle:

From the sunken battle ship Maine.

On the other:

July 1st 1898, San Juan, Carried and used by Col. Theodore Roosevelt.

Following Roosevelt’s death in 1919, the Sagamore Hill estate in Oyster Bay, New York, was home to his wife, Edith, until her death in 1948. The property was later donated to the National Park Service in 1963 and became Sagamore Hill National Historic Site. The gun went on display along with many of the former president's other personal effects, eventually settling in the Old Orchard near the uniform he wore during the Battle of San Juan Heights.

In 1963, the Colt came up missing for the first time. With no guard or contemporary security system in place, someone nicked it from the building. Fortunately, it was soon found in the woods behind the museum, slightly rusty from being exposed to the elements but otherwise unharmed. The perpetrator may have gotten spooked after taking off with it and decided to abandon the contraband, but no one had a chance to ask—he or she was never caught.

By April of 1990, the gun and uniform were in a display case borrowed from the American Museum of Natural History. While somewhat of a deterrent, it didn't offer much in the way of security. “The case could be lifted and the lock just popped open,” Sarna says.

Sarna had just started at the museum back then. According to her, the case had either been disturbed by a thief or possibly left open by someone cleaning the display, inviting a probing set of hands. Either way, the gun disappeared—but it wasn’t immediately obvious.

“No one was sure what day it had happened,” she says; the best guess was that the theft had occurred between April 5 and 7. “You’d have to walk into the room it was in and look in the case. If you’re just walking by, you’d see the uniform, but not necessarily the gun.”

It was chief ranger and head of visitor services Raymond Bloomer Jr. and ranger John Foster who discovered the theft one morning. The lock had been popped but the glass was not broken. Sarna and the other employees conducted a search of the property, believing that perhaps someone had taken the Colt out for cleaning. When that failed to produce any results, they notified the National Park Service, which is the first line of investigation for theft on government-owned park property. The NPS, in turn, contacted local authorities in Nassau County and Cove Neck, New York. Soon, the FBI was involved.

Predictably, law enforcement looked at museum employees with a critical eye. “There were all different types of people here interviewing us,” Sarna says. “In museums, the majority of thefts are an inside job.”

Theodore Roosevelt is pictured in uniform
Roosevelt in uniform while leading the Rough Riders.
Wikimedia Commons // Public Domain

Park ranger and museum staffer Scott Gurney, who was hired in 1993, tells Mental Floss that the suspicion cast over employees—none of whom were ever implicated—remained a sore spot. “I found an old police report about it in a desk and asked a ranger about it,” Gurney says. “He got really mad at me and told me not to bring it up again. It was kind of a black eye for the people working there.”

As Sarna and the others set about installing a security system in the museum, the FBI started casting a wide net to locate the weapon, which was uninsured. “It was basically a shoplifting incident,” Robert Wittman, a retired FBI agent in their art crimes division who worked on the case from the mid-1990s on, tells Mental Floss. “It wasn’t all that unusual. In the 1970s and 1980s, lots of small museums were getting hit.” Worse, one of the museum staff working the front desk within view of the display was, according to Gurney, legally blind. The lack of security, Wittman says, was in part because pieces weren’t initially all that valuable on the collector’s market.

The Colt was unique in that it was so readily identifiable. Thanks to the inscriptions, it would invite questions if the thief attempted to sell the weapon. Any attempt to alter it would destroy its cultural value and defeat the purpose of taking it. The FBI sent notices to gun dealers and monitored gun shows in case it turned up. Nothing seemed promising.

“We heard things constantly,” Sarna says. “Someone said it was seen in Europe. Someone else said it was in private hands, or that a collector had it.” Later, when the museum was able to start receiving emails via the burgeoning world of the internet, more tips—all dead ends—came in. Another rumor had the gun being bought during a gun buyback program in Pennsylvania and subsequently destroyed. This one looked promising, as it bore the same serial number. But it turned out to be a different model.

A reward was offered for information leading to the gun’s retrieval, with the amount eventually climbing to $8100. But that still wasn’t sufficient for the gun to surface. “We really had no lines on it,” Wittman says.

Then, in September 2005, Gurney began receiving a series of calls while working in the visitor’s center. The man had a slight speech impediment, he said, or might have been intoxicated. Either way, he told Gurney he knew where the gun was. “He told me it was in a friend’s house, but that he didn’t want to get the friend in trouble.”

The man continued calling, each time refusing to give his name and ignoring Gurney’s suggestion to simply drop the gun in the mail. The man also spoke to Amy Verone, the museum’s chief of cultural resources. He was certain he had seen Theodore Roosevelt’s gun, wrapped in an old sweatshirt in DeLand, Florida. He described the engravings to Verone, who hung up and immediately called the FBI.

 

After more calls and conversations, including one in which Gurney stressed the historical importance of the weapon, the caller eventually relented and gave his information to the FBI. A mechanical designer by trade, Andy Anderson, then 59, said he had seen the gun the previous summer. It had been shown to him by his girlfriend, who knew Anderson was a history buff. She told Anderson her ex-husband had originally owned the firearm. It had been in a closet wrapped in a sweatshirt before winding up under a seat in the woman’s mini-van, possibly obscured by a dish towel. Presumably, her ex had been the one who had stolen it back while visiting the museum as a New York resident in 1990.

Theodore Roosevelt's Rough Riders uniform is pictured on display at Sagamore Hill
Roosevelt's Rough Riders uniform sits on display at Sagamore Hill next to his Colt.
Courtesy of Sagamore Hill National Historic Site

After Anderson contacted Sagamore Hill, FBI agents were dispatched from the Daytona Beach office to DeLand to question Anderson. He obtained the revolver from his girlfriend and handed it over, though he apparently tried to convince the FBI to let him return the weapon without disclosing the thief’s identity. The FBI didn’t agree to an anonymous handoff, however, and in November 2006 the ex-husband, a 55-year-old postal employee whom we’ll refer to as Anthony T., was charged with a misdemeanor in U.S. District Court in Central Islip, New York.

Wittman remembers that the split between Anthony T. and his wife had been acrimonious and that she had no involvement in the theft. “We were not going to charge her with possession of stolen property,” he says.

Wittman went to Florida to pick up the Colt and brought it back to the Philadelphia FBI offices, where it was secured until prosecutors authorized its return to Sagamore Hill on June 14, 2006. Schreier, the NRA museum’s senior curator, arrived at Sagamore Hill with Wittman, FBI Assistant Director in Charge in New York Mark Mershon, and Robert Goldman, the onetime U.S. assistant attorney and art crime team member who was himself a Roosevelt collector and had doggedly pursued the case for years. When Schreier confirmed its authenticity, the gun was formally turned back over.

There was no reasonable defense for Anthony T. In November of that year, he pled guilty to stealing the Colt. While he was eligible for up to 90 days in jail and a $500 fine, Anthony T. received two years of probation along with the financial penalty and 50 hours of community service. According to Wittman, cases of this sort are based in part on the dollar value of the object stolen—the weapon was valued at $250,000 to $500,000—not necessarily its historical value. “The sentencing may not be commensurate with the history,” Wittman says.

From that perspective, the Colt takes on far greater meaning. It was used in a battle that cemented Roosevelt’s reputation as a leader, one credited with helping bolster his national profile. It was used in commission in the death of a human being, giving it a weight and history more than the sum of its metal parts.

“It’s looked at as one of his greatest triumphs,” Sarna says of the Rough Riders and the U.S. victory in the 1898 conflict. “It brought us into a new century and out of isolationism.”

It’s once more on display at Sagamore Hill, this time under far better security and surveillance. (Though the museum is still vulnerable to heists: a reproduction hairbrush was recently swiped.) Sarna, who wasn’t sure if she would ever see the Colt again, is glad to see it where it belongs.

“Thank goodness they got divorced,” she says.

It’s not publicly known why Anthony T. felt compelled to take the Colt. Wittman describes it as a crime of opportunity, not likely one that was planned. After the plea, Anthony T. was let go from his job, and his current whereabouts are unknown. Prosecutors called it a mistake in judgment.

Anderson, the tipster, lamented any of it had to happen. “We’re talking about a mistake he made 16 years ago,” Anderson told the Orlando Sentinel in November 2006. “I have no regrets, but I never meant to cause trouble. I wish Anthony the best.”

If Anthony T. was an admirer of Roosevelt’s, he might find some poetic peace in the fact that he pled guilty to violating the American Antiquities Act of 1906, which was instituted to prevent theft of an object of antiquity on property owned by the government.

That bill was signed into law by Theodore Roosevelt.

15 Amazing Facts About the Washington Monument

iStock/Sean Pavone
iStock/Sean Pavone

It's the tallest building in Washington, D.C. and it honors the first U.S. president, George Washington. Here are a few more Washington Monument facts to celebrate the anniversary of its completion on December 6, 1884.

1. Building a monument to George Washington was not a unanimously supported idea.

Today, trumpeting George Washington as a hero and a symbol of national pride isn’t going to start any arguments. In the 19th century, however, Washington’s approval rating was far from 100 percent. The very idea of constructing a monument to honor the former president felt like an affront to the Democratic-Republicans—the opposing party to the Washington-aligned Federalists—who both favored Thomas Jefferson over Washington and decried such tributes as unseemly and suspiciously royalist.

2. It took almost 40 years to complete the Washington Monument's construction.

After decades of deliberation about where to build a monument to George Washington, what form it should take, and whether the whole thing was a good idea in the first place, the foundation for a great stone obelisk was laid at the center of Washington, D.C.’s National Mall on July 4, 1848. Although the design looks fairly simple, the structure would prove to be a difficult project for architect Robert Mills and the Washington National Monument Society. Due to ideological conflicts, lapses in funding, and disruptions during the Civil War, construction of the Washington Monument would not be completed until February 21, 1885. The site opened to the public three years later. 

3. A coup within the Washington National Monument Society delayed construction.

In 1855, an anti-Catholic activist group nicknamed the Know-Nothings seized control of the 23-year-old Washington National Monument Society. Once in power, the Know-Nothings rejected and destroyed memorial stones donated by Pope Piux IX. The Know-Nothing affiliation cost the project financial support from the public and from Congress. In 1858, after adding only two layers of masonry to the monument, the Know-Nothings abdicated control of the society. 

4. Early ideas for the Washington Monument included statues, Greek columns, and tombs. 

Before the society settled on building an obelisk, several other ideas were suggested as the visual representation of George Washington’s grandeur. Among them were an equestrian statue of the first president (which was part of Pierre L’Enfant’s original plan for Washington, D.C.), a separate statue situated atop a classical Greek column, and a tomb constructed within the Capitol building. The last idea fell apart when Washington’s family was unwilling to move his body from its resting place in Mount Vernon.

5. Later design plans included an elaborate colonnade ...

Even after Mills’ obelisk model had been accepted, a few flashier design elements received consideration as possible additions to the final project. Mills had originally intended to surround the tower with a circular colonnade, featuring not only a statue of George Washington seated gallantly atop a chariot, but also 30 individual statues of renowned Revolutionary War heroes. 

6. ... and an Egyptian sun.

Mills placed a winged sun—an Egyptian symbol representing divinity—above the doorframe of the Washington Monument’s principal entrance. The sun was removed in 1885. 

7. The monument originally had a flat top.

It has become recognizable for its pointed apex, but the Washington Monument was originally designed to bear a flat top. The monument's design was capped with a pyramid-shaped addition in 1879.

8. The engineer who completed the Washington Monument asked the government to supply his workers with hot coffee.

Several years after the 1855 death of Mills, Col. Thomas Lincoln Casey Sr., chief of engineers of the United States Army Corps of Engineers, assumed responsibility for completing the Washington Monument. Among his most memorable orders was an official request to the U.S. Treasury Department to supply his workers—specifically those assigned to the construction of the monument’s apex—with “hot coffee in moderate quantities.” The treasury complied. 

9. Dozens of miscellaneous items are buried beneath the monument.

On the first day of construction, a zinc case containing a number of objects and documents was placed in the Washington Monument’s foundation. Alongside copies of the Constitution and the Declaration of Independence are a map of the city of Washington, publications of Census data, a book of poems, a collection of American coins, a list of Supreme Court justices, a Bible, daguerreotypes of George Washington and his mother Mary, Alfred Vail’s written description of the magnetic telegraph, a copy of Appleton’s Railroad and Steamboat Companion, and an issue of the arts and leisure magazine Godey’s Lady’s Book, among many other items.

10. Some of the Washington Monument's memorial stones bear strange inscriptions.

The vast majority of the 194 memorial stones lining the Washington Monument are not likely to inspire confusion. Common inscriptions celebrate George Washington, the country, and the states they represent. However, a few of the monument’s stones bear engravings of a more curious variety. A stone donated by a Welsh-American community from New York reads (in Welsh), “My language, my land, my nation of Wales—Wales for ever.” Another stone from the Templars of Honor and Temperance articulates the organization’s rigid support of Prohibition: “We will not make, buy, sell, or use as a beverage any spirituous or malt liquors, wine, cider, or any other alcoholic liquor, and will discountenance their manufacture, traffic, and use, and this pledge we will maintain unto the end of life.” 

11. The apex was displayed at Tiffany's before it was added to the structure.

The men who created the Washington Monument, though reverent in their intentions, were hardly above a good publicity stunt. William Frishmuth, an architect and aluminum magnate connected to the project, arranged for the pointed aluminum top of the monument to enjoy an ornate two-day display at New York City’s luxury jewelry store Tiffany’s. The apex was placed on the floor of the storefront so that shoppers could claim to have walked “over the top of the Washington Monument.” 

12. Opening ceremonies attracted several big-name guests.

Among the 20,000 Americans present for the beginning of construction in 1848 were then-President James K. Polk, three future presidents (James Buchanan, Abraham Lincoln, and Andrew Johnson), former first lady Dolley Madison, Alexander Hamilton's widow Elizabeth Hamilton (John Quincy Adams' widow was too sick to attend), and a bald eagle.

13. The Washington Monument was the tallest structure in the world for about six months.

Upon its official opening on October 9, 1888, the Washington Monument—standing an impressive 555 feet high—boasted the superlative of tallest manmade structure on Earth. The honor was short-lived, however, as the following March saw the unveiling of the Eiffel Tower, which topped out at 986 feet. 

14. It is still the tallest of its kind.

As of 2019, the Washington Monument still reigns supreme as both the world’s tallest all-stone structure and the tallest obelisk. (The stone San Jacinto Monument in Texas is taller, but it sits on a concrete plinth.)

15. A few decades after construction, the monument caught "tuberculosis."

Wear and tear had begun to get the best of the Washington Monument by the early 20th century, prompting an exodus of the cement and rubble filler through the structure’s external cracks. The sweating sensation prompted John S. Mosby Jr., author of a 1911 article in Popular Mechanics, to nickname the phenomenon “geological tuberculosis.”

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