Fig. 12— Germ Content of Barn Air During 

 Bedding, Cleaning Up, Feeding, Etc. 



Fig. 13 — Germ Content of Barn Air During 

 Bedding, Cleaning Up, Feeding, Etc. 



Gelatine plate exposed to tlie deposition ot 

 g-erms for one minule in a stable when some of 

 the above operations were in progress. 



Gelatine plate exposed to the deposition of 

 germs for one minute in a stable when all the 

 above operations had been comjileted. 



Fig. 14 — Contamination from the use of 

 Improperly Cleaned Dairy Utensils. 



Fig. 15 — Contamination from the use of 

 Properly Cleaned Dairy Utensils. 



After a can had been washed with warm water, 

 and thoroughly drained, a quantity of sterile 

 water was added and the can well rinsed. This 

 gelatine plate was made from jj^ c. c. (a very 

 tiny drop) of this water. 



After a can had been washed, scalded and 

 steamed for five minutes, and thoroughly drained, 

 a quantity of sterile water was poured in and the 

 can well rinsed. This gelatine plate was then 

 made from i c. c. (about six drops) of this water. 



