CLOSE
Original image

How the Allies Used Germany's Serial Numbers Against Them

Original image

Dan Lewis runs the popular daily newsletter Now I Know ("Learn Something New Every Day, By Email"). We've invited him to share some of his stories on mental_floss this week. To subscribe to his daily email, click here.

Europe and the Pacific were the two primary arenas in World War II, but the battle was also one of technological achievement. Airplanes, submarines, and of course the development of the atomic bomb were core markers to the arms race within the War. Similar, tank warfare was as much a function of innovation as it was anything else. Allied forces readily admitted that the enemy German tanks, such as the Tiger and Panther, were superior to their own. The big question for Allied forces, then, was not how to counter the Tiger and its progeny, but how many tanks Germany was able to produce.

To solve this problem, the Allies first turned to conventional intelligence gathering: spying, intercepting and decoding transmissions, interrogating captured enemies, etc. Via this method, the Allies deduced that from June 1940 to September 1942, the German military industrial complex was churning out roughly 1,400 tanks each month -- an enormous amount. By comparison, the Axis forces used "only" 1,200 tanks during the Battle of Stalingrad, an eight month battle with a total casualty count nearing 2 million people.

Perhaps skeptical of the above result, the Allies looked for other methods of estimation. And then they found a critical clue: serial numbers. Specifically, Allied intelligence noticed that each captured German tank (and wreckage thereof) contained a serial number unique to that tank. With a bit of careful observation, the Allies were able to determine that the serial numbers had a pattern denoting the order of tank production.

Using this data, the Allies were able to create a mathematical model to determine the rate of German tank production, and estimated that, during the same summer 1940 to fall 1942 time period, the Germans actually produced 255 tanks per month -- a fraction of the 1,400 estimate produced by conventional intelligence. (Want to see the math? Click here.) And it turns out, this method worked best: after the War, internal German data put the number at 256 tanks per month.

To subscribe to Dan's daily email Now I Know, click here. You can also follow him on Twitter.

arrow
Space
Google Street View Now Lets You Explore the International Space Station

Google Street View covers some amazing locations (Antarctica, the Grand Canyon, and Stonehenge, to name a few), but it’s taken until now for the tool to venture into the final frontier. As TechCrunch reports, you can now use Street View to explore the inside of the International Space Station.

The scenes, photographed by astronauts living on the ISS, include all 15 modules of the massive satellite. Viewers will be treated to true 360-degree views of the rooms and equipment onboard. Through the windows, you can see Earth from an astronaut's perspective and a SpaceX Dragon craft delivering supplies to the crew.

Because the imagery was captured in zero gravity, it’s easy to lose sense of your bearings. Get a taste of what ISS residents experience on a daily basis here.

[h/t TechCrunch]

Original image
Lucy Quintanilla/iStock
arrow
travel
6 East Coast Castles to Visit for a Fairy Tale Road Trip
Original image
Lucy Quintanilla/iStock

Once the stuff of fairy tales and legends, a variety of former castles have been repurposed today as museums and event spaces. Enough of them dot the East Coast that you can plan a summer road trip to visit half a dozen in a week or two, starting in or near New York City. See our turrent-rich itinerary below.

STOP 1: BANNERMAN CASTLE // BEACON, NEW YORK

59 miles from New York City

The crumbling exterior of Bannerman Castle
Garrett Ziegler, Flickr // CC BY-NC-ND 2.0

Bannerman Castle can be found on its very own island in the Hudson River. Although the castle has fallen into ruins, the crumbling shell adds visual interest to the stunning Hudson Highlands views, and can be visited via walking or boat tours from May to October. The man who built the castle, Scottish immigrant Frank Bannerman, accumulated a fortune shortly after the Civil War in his Brooklyn store known as Bannerman’s. He eventually built the Scottish-style castle as both a residence and a military weapons storehouse starting in 1901. The island remained in his family until 1967, when it was given to the Taconic Park Commission; two years later it was partially destroyed by a mysterious fire, which led to its ruined appearance.

STOP 2. GILLETTE CASTLE STATE PARK // EAST HADDAM, CONNECTICUT

116 miles from Beacon, New York

William Gillette was an actor best known for playing Sherlock Holmes, which may have something to do with where he got the idea to install a series of hidden mirrors in his castle, using them to watch guests coming and going. The unusual-looking stone structure was built starting in 1914 on a chain of hills known as the Seven Sisters. Gillette designed many of the castle’s interior features (which feature a secret room), and also installed a railroad on the property so he could take his guests for rides. When he died in 1937 without designating any heirs, his will forbade the possession of his home by any "blithering sap-head who has no conception of where he is or with what surrounded.” The castle is now managed by the State of Connecticut as Gillette Castle State Park.

STOP 3. BELCOURT CASTLE // NEWPORT, RHODE ISLAND

74 miles from East Haddam, Connecticut

The exterior of Belcourt castle
Jenna Rose Robbins, Flickr // CC BY-SA 2.0

Prominent architect Richard Morris Hunt designed Belcourt Castle for congressman and socialite Oliver Belmont in 1891. Hunt was known for his ornate style, having designed the facade of the Metropolitan Museum of Art and the Breakers in Newport, Rhode Island, but Belmont had some unusual requests. He was less interested in a building that would entertain people and more in one that would allow him to spend time with his horses—the entire first floor was designed around a carriage room and stables. Despite its grand scale, there was only one bedroom. Construction cost $3.2 million in 1894, a figure of approximately $80 million today. But around the time it was finished, Belmont was hospitalized following a mugging. It took an entire year before he saw his completed mansion.

STOP 4. HAMMOND CASTLE MUSEUM // GLOUCESTER, MASSACHUSETTS

111 miles from Newport, Rhode Island

Part of the exterior of Hammond castle
Robert Linsdell, Wikimedia Commons // CC BY 2.0

Inventor John Hays Hammond Jr. built his medieval-style castle between 1926 and 1929 as both his home and a showcase for his historical artifacts. But Hammond was not only interested in recreating visions of the past; he also helped shape the future. The castle was home to the Hammond Research Corporation, from which Hammond produced over 400 patents and came up with the ideas for over 800 inventions, including remote control via radio waves—which earned him the title "the Father of Remote Control." Visitors can take a self-guided tour of many of the castle’s rooms, including the great hall, indoor courtyard, Renaissance dining room, guest bedrooms, inventions exhibit room, library, and kitchens.

STOP 5. BOLDT CASTLE // ALEXANDRIA BAY, THOUSAND ISLANDS, NEW YORK

430 miles from Gloucester, Massachusetts

It's a long drive from Gloucester and only accessible by water, but it's worth it. The German-style castle on Heart Island was built in 1900 by millionaire hotel magnate George C. Boldt, who created the extravagant structure as a summer dream home for his wife Louise. Sadly, she passed away just months before the place was completed. The heartbroken Boldt stopped construction, leaving the property empty for over 70 years. It's now in the midst of an extensive renovation, but the ballroom, library, and several bedrooms have been recreated, and the gardens feature thousands of plants.

STOP 6. FONTHILL CASTLE // DOYLESTOWN, PENNSYLVANIA

327 miles from Alexandria Bay, New York

Part of the exterior of Fonthill castle

In the mood for more castles? Head south to Doylestown, Pennsylvania, where Fonthill Castle was the home of the early 20th century American archeologist, anthropologist, and antiquarian Henry Chapman Mercer. Mercer was a man of many interests, including paleontology, tile-making, and architecture, and his interest in the latter led him to design Fonthill Castle as a place to display his colorful tile and print collection. The inspired home is notable for its Medieval, Gothic, and Byzantine architectural styles, and with 44 rooms, there's plenty of well-decorated nooks and crannies to explore.

SECTIONS

More from mental floss studios