National Geographic : 1947 May
602 The National Geographic Magazine Burlap Bandages Protect a Find of Three Rhinoceros Skulls As soon as the chunk of brittle, fragile bones has been "tooled out" of the surrounding shale, it is covered with cloth saturated with a thin mixture of water and plaster of Paris. This hardens into a cast. Joselph P. Connolly Encased in Plaster Casts, Bone-filled Rocks Are Loosened at the Base Expedition members enjoyed working with the rhinoceros skulls, because they found the specimens in a shady spot. In July the thermometer often rose to 1300 F. in the sun and above 100 in the shade.