26 



ANALYTICAL PROCESSES. 



indicate any fat whatever in milks which contain less 

 than about .5 per cent. By substituting for the above 

 mixture of sulfuric acid and acetic acid, one made 

 of hydrochloric acid and lactic acid in the same por- 

 portion (i to 1 9) this objection is overcome. The pro- 

 cess so modified has been patented by the Separator 

 Company of Stockholm. 



Leffmann-Beam Method. The cost of the lacto- 

 crite has prevented its general adoption. The follow- 

 ing method devised by ourselves, can be applied much 

 more cheaply both as regards the original cost of the 

 apparatus, and of the chemicals required for the test 

 the latter being no inconsiderable item when many tests 

 are made with the lactocrite. The manipulation is also 

 very much simplified, the entire operation being per- 

 formed in one test-bottle, and the use of the water-bath 

 avoided. 



The annexed cuts show the form of centrifugal ma- 

 chines, bottles and other accessories used. Machines 

 arranged for either two, four, six, eight or twelve bot- 

 tles are manufactured. The process is covered by pa- 



3CC PIPETTE. 



