PRELINGER ARCHIVE, HOUSE IN THE MIDDLE.) In both, wooden structures were exposed to the heat of the detonation, measured in calories per square centimeter. As you look at the slide shows, keep in mind that the outside edge of the firestorm at Hiroshima occurred at 10 calories per square centimeter. The photographs from Shot ENCORE were purchased as prints from what is now the Nevada Site Office. They are public domain, and you are free to use them. Simply say "Photo courtesy of National Nuclear Security Administration / Nevada Site Office."
Previously, at Operation UPSHOT-KNOTHOLE, the nationally-televised Shot ANNIE, a 16 kiloton detonation, was held on March 17, 1953. The Federal Civil Defense Administration (FCDA) had projects here termed "Operation DOORSTEP." Two wood-frame houses-"House No. 1" and "House No. 2"-along with backyard shelters and "fifty automobiles of various types, colors, and operating conditions" were exposed to the effects of the bomb "to show the people of America what might be expected if an atomic burst took place over the doorsteps of our major cities." Shown here is House No. 1. According to Samuel Glassone's authoritative THE EFFECTS OF NUCLEAR WEAPONS(1957), "Since the tests were intended for studying the effects of blast, precautions were taken to prevent the houses from burning. The exteriors were consequently painted white.... The windows ... were equipped with metal venetian blinds having an aluminum finish.... The houses were roofed with light gray shingles ... of asbestos cement.... There were no [gas or electrical utilities of any kind." These are some of the most famous nuclear test pictures ever taken. They were obtained electronically from the NEVADA SITE'S very good photo library. Again, these photos are public domain. The credit is the same as above.
These experiments, as well as several others, are discussed in detail in WHOLE WORLD ON FIRE, chapter 6.
Click below to access slideshows
Shot ENCORE: The House in the Middle
Shot ENCORE: Two Block Houses
Shot ANNIE: House No. 1