A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy
A popular mineralogy handbook by L. P. Gratacap, curator at the American Museum of Natural History, published in New York by D. Van Nostrand in 1912 for amateur collectors and museum visitors. The plates are halftone photographs of single crystals and clustered specimens, lit against plain grey or black grounds with inch scales, giving faceted silhouettes and grainy tonal texture.
