AMOUNT OF ALCOHOL IN WINE. 161 



Madeira, specific gravity = 0-9971. 



Spirit distilled from it, and restored again by water 

 to its original volume, has a specific gravity of 0'9782. 

 The wine freed from alcohol, and reduced to its 

 original volume by water, has a specific gravity = 

 1-0181. 0-9971 0-0181 = 0-9790, gives at 59*5 E., 

 15,5 C. 17^-per cent, alcohol, whilst 0.9782, the 

 specific gravity of the wine, would give 18 per cent, 

 alcohol. Here, again, is a difference, as the spirit 

 distilled over showed a higher rate of alcohol. 



Teneriffe wine, specific gravity = 0'9945. 



Spirit distilled (as above), specific gravity =0'9790. 



Wine, evaporated in the manner detailed above, 

 sp. gr. = 1-0151. 0-9945 0-0151=0'9794, which gives 

 exactly 17 per cent, alcohol, whilst the specific gravity 

 of the spirit, which was found to be 0'9790, gives the 

 alcoholic contents of the wine at 17 per cent. 



Ehine wine (Eiidesheimer) . sp. gr.= 0*9960 

 Spirit, as detailed above . . sp.gr.=0'9881 

 Evaporated wine .... sp. gr. = 1*0086 



0-9960 0-0086 = 0*9874, representing alcoholic 

 contents = 9 per cent., whilst 0'9881 the specific 

 gravity of the distilled spirit, gives 8, that is, a dif- 

 ference of f per cent, in the alcoholic contents. 



M 



