[31] Industries, January 25th, 1889.
[32] "Seventh Annual Report of Local Government Board," 1877-8.
[33] School of Mines Quarterly Journal of Applied Science, January, 1889, New York.
[34] These balances may be obtained from Mr. Oertling, Coppice Row, London, or of any philosophical instrument maker.
[35] There are two principal methods of analysing or assaying alkalies by means of the test-acid, namely, volumetric, or by volume, and gravimetric, or by weight, in which a specific gravity bottle, capable of holding exactly 1,000 grains of distilled water, is used.
[36] New York Paper Trade Journal, 1878.
7, Stationers' Hall Court, London, E.C.
May, 1894.
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