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1
In preparing the double sulphate, English grain nickel is decidedly the best form of metal to use.
Scientific American Supplement, No. 586, March 26, 1887
2
The compound used principally for the electro-deposition of nickel is a double sulphate of nickel and ammonia.
Scientific American Supplement, No. 586, March 26, 1887
3
Nickel is found to deposit best from a solution of the double sulphate of nickel and ammonia.
The Story of Electricity
4
ALUM, in chemistry, a term given to the crystallized double sulphates of the typical formula M2SO4.M2111.
The Project Gutenberg Encyclopedia, Volume 1 of 28