56 EXAMPLES OF CHANGE OF 



depends on the dissimilar nature of the liquids or 

 of the substances dissolved in them. An unequal 

 proportion of the same dissolved matters (unequal 

 concentration), acts in many cases, just as if the 

 liquids contained dissimilar substances. 



Although the experiments hitherto instituted, and 

 the results obtained by FISCHER (who first observed 

 these phenomena), MAGNUS, DUTROCHET, and others, 

 admit of no comparison, since the apparatus used 

 by them shewed only relative change of volume, 

 yet a knowledge of some of these results is never- 

 theless of importance. 



Examples When the two liquids are, diluted sulphuric acid 



ofvohTme; (of sp. g. T093) and water, the acid, at 50 F., 

 increases in volume ; but if the acid have the 

 specific gravity 1-054, the volume of the water 

 increases. 



in acids, Diluted tartaric acid (11 parts of the crystallized 



acid and 89 of water) and water mix through a 

 bladder without change of volume ; with more than 

 11 per cent, of acid, the volume of the acid in- 

 creases ; with less, that of the water. 



and neutral Solutions of animal gelatine, gum, sugar, and 

 albumen increase in volume when separated by a 

 bladder from water ; and the increase of volume in 

 these different solutions, although of the same spe- 

 cific gravity, is very different indeed. When the 

 specific gravity is 1*07, the increase in volume of 

 the solution of gelatine amounts to 3, that of solu- 

 tion of gum to 5, of sugar 11, of albumen 12. 



