Vlll CONTENTS. 



PAGE 



Molten zinc and lead (or bismuth) do not mix, . . 94 



Separation of mixed liquids by evaporation, . - .- 95 



Extraction of fatty and oily matters, . . ;. 95 



Precautions requisite with ether, . . \r--.- 96 



Separation of fatty matter from milk : milk analysis, . 97 



Steam bath, . . . ... . . 97 



Chemical balance, . . -.'-.- -V . 98 



Liquid diffusion, . '..... . . '.-.: . 99 



Dialysis and osmosis : crystalloids and colloids, . 100 



Tests for copper and starch, . - < . . 103 



Endosmosis and exosmosis, .... 104 



Alteration in bulk during intermixture, . * . . 105 



Precautions requisite with sulphuric acid, ."''-. . 106 



CHAPTER IX. Spontaneous Intermixture of Gases without 



Chemical Action taking place : Gaseous Diffusion, . 106-116 



Carbon dioxide : preparation: heaviness, . . 107 



Gas generators, . . . . . 108 



Collection by displacement, ; . . . . . . 109 



Diffusion of carbon dioxide, . , . . , f . . Ill 



Hydrogen : preparation : lightness, , . . Ill 



Diffusion more rapid with lighter gas and vice versa, . 113 



Pressure produced by diffusion : fountain, ( > ; ,; . 115 



j 4. SOLUTION AND SEPARATION FROM SOLUTION BY ACTIONS IN- 

 VOLVING CHEMICAL CHANGES, .... 116-160 



CHAPTER X. Solution of Solids in Liquids and Separation 



of Solids from Liquids, . . . . 116-135 



Solution where chemical change is invisible to the eye, . 117 



Do. accompanied by change of colour, . . 118 



Do. do. evolution of gas, . . 119 



Do. of copper, iron, and silver, . . . 120 



Separation of silver from copper, . . . 122 



Separation of solids from solution by precipitation, . 122 



Coloured precipitates, 122 



Precipitation by simple heating : test for grape sugar, . 123 



Precipitation and re-solution in excess, . . . 125 



Detection of lead and copper in drinking water, . 125 



Do. do. in pickles, . . 126 



Solid mass produced by mixing two liquids, . . 128 



Invisible writing made visible, ... . 129 



Sympathetic inks : summer and winter pictures, . 130 



Chemical weather prognosticators, . , *. . . 131 



