316 



MILK 



temperature encourages germ growth. Furthermore, the handling 

 and repeated steriUzing of cans subject theui to rough usage, 

 so that dents are formed which offer hiding places for bacteria. 

 The inside wall of cans and other utensils should be smooth and 



Fig. ISG.^The "^cv,- York Spe- 

 cial" uiilk-can. (A. H. Barber Cream- 

 ery Supply Co.) 



Fig. 137. — Sanitary cold-hold can. 



the corners rounded off. Seams should be filled with solder, and 

 after washing no moisture should remain (Figs. 132-137). 



Similarly, the strainers (Figs. 138-140), the coolers (Figs. 141- 

 143), and the bottling machines (Figs. 144-147) rec|uire care in 

 order to clean out hiding places of bacteria. Strainers should 



Fig. 13S. — Ekvall Duplex nuJk strainer. (A. li. Barber Creamery Supply Co.) 



be constructed so as to have a h.igher center than periphery, so 

 as to facilitate washing down dirt jiarticles without exposing them 

 to the new streams of milk that tend to break them up. Valves, 

 bearings, and other intricate parts of machinery need special 



