34 



BUTTER-MAKING. 



and the ordinary hydrometer. The Quevenne lactometer is the 

 one that is used chiefly in creameries. The graduation of each 

 one of them is given in the accompanying diagram. It may be 



N a 



'■ S " Specific Gravity Scale., 

 " N " New York State. 

 " Q" Quevenne, 

 Fig. 4. — Comparative graduation of lactometer stems. 



seen from the figures that in order to change the Quevenne 

 lactometer reading into specific gravity, all that is necessary is 

 to add 1000 and divide the sum by 1000. In order to change the 



