DR. L. GALL ON IMPROVEMENTS IN WINE-MAKING. 289 



6 per cent, of acids, so it should also admonish ns to give them 

 at least 24 per cent, of sugar, and by this about 12 per cent, of al- 

 cohol. We should, however, never go beyond 14 per cent, of it. 

 Quite sufficient for the greater part of the home-consumed wines 

 is 8 per cent. 



The Vaporimeter. 



The Vaporimeter. 



This instrument is invented by Mr. Geisler, an eminent optician 

 at Bonn. The accompanying cut shows it in one third of its size. 

 Its four main parts. A, B, C, D, must be put together, when want- 

 ed, in the manner represented in Fig. 1. A is a small steam-boil- 

 er standing upon three feet, half filled with water, and heated by 

 the spirit-lamp (e) underneath. BB is a double-bended glass tube, 

 which is fixed upon an angular brass plate {m\ together with a 

 scale belonging to it. This plate can be moved upon the vessel 

 A, and fixed on it. C is a strong glass vessel called the quicksil- 



T 



