19.c crystalline specimens
19.d crystal axis models
36 Melting pot apparatus
78.b copper K sulphate
78.d sulphite crystals
78.f cupric potassium sulphate
78.g cobalt potassium sulphate
78.h chrome alum overgrown with potash
78.i nickel sulphate & cobalt potassium sulphate
78.j zinc K sulphate over nickel potassium sulphate.
78.k cobalt potassium sulphate with overgrowth of zinc potassium sulphate
78.I.i magnesium K suphate
78.l.ii nickel K sulphate
169 Melting Point Apparatus
Identification of solids: items 19, 36, 78 b – l, 169
The shapes of crystals and the melting points of solids were means of identification of unknown compounds. Idealised crystal shapes (or habits), item 19, and standard crystalline substances, items 78 b – l, were important reference materials. Melting points could be obtained by simple glass apparatus immersed in a heated bath, item 169, or by more sophisticated “heated stage” microscope apparatus, item 36.