206 



MILK 



Fig. 80. Gooch filtering apparatus, showing also unassembled parts, e. g., 

 porcelain Gooch crucible, with perforated sieve bottom, glass Gooch funnel, 

 and pressure tubing leading to Chapman pump. (Tonney, Amer. Jour, of 

 Public Health, 1912, vol. 2, p. 280.) 



Fig. 81. A simple aid to sediment testing. This convenient method 

 of fastening the sediment tester by means of a telephone bracket is a handy 

 time saver. (Bull. 241, July, 1914, Univ. of Wis. Agri. Exp. Sta.) 



