[5] ‘Chemistry of Foods.’
[6] ‘Tea, Coffee, and Cocoa Analysis.’
[7] The degrees of temperature given in the text refer to the Centigrade thermometer; their equivalents on the Fahrenheit scale can be obtained by means of the formula 9⁄5C.° + 32 = F.°.
[8] In low grade, but unadulterated Congou tea, the extract occasionally falls so low as 25 per cent.
[9] Op. cit.
[10] Pharm. Centralbl., 1885, p. 346.
[11] Graham, Stenhouse and Campbell.
[12] Leebody, ‘Chemical News,’ xxx. p. 243.
[13] ‘Foods: Composition and Analysis.’
[14] Jahresberichte, 1883, p. 1002.