V8 



The dimensions of the instrument are chosen to insure sufficient 

 ease of motion and to prevent unnecessary length of stem. 



Centesimal Galactometer, or Lactometer. Quevenne's Lactodensimeter. 

 It is weighted to such an extent, that it sinks in a salt solution 

 of 1.042 specific gravity, at 15° C, to a point which is marked 42. 

 Milk mixed with half its volume of water has a specific gravity 

 of 1.014 to 1.016. Therefore, a second point is determined by 

 putting the areometer in a salt solution of 1.014 specific gravity, 

 at 15° 0. This point is marked 14. The space between 14 and 

 42 is then divided by lines in 28 equal parts, or degrees. The dis- 

 tance between each two degrees is about 2 m.m. It is, therefore, 

 not difficult to read the specific gravity easily to 0.0005 with suf- 

 ficient accuracy. 



