Copper Sulphate Small 320×317 Medium 640×635 Large 1024×1016 Download Tiff Original 2419×2400 | (1.4 MB) Description "The crystalline form of copper sulphate." — Hallock, 1905 Keywords copper, crystalline, sulphate Galleries Chemical Elements and Compounds Source: V. I. Hallock I.C.S. Refrence Library (Scranton: International Textbook Company, 1905) Courtesy the private collection of Roy Winkelman
