G4 Report oF DEPARTMENT OF BACTERIOLOGY OF THE 
warmer portion of the year it was difficult to keep the milk 
sufficiently sweet to pass through a centrifugal separator after 
48 hours even when held in cold running water. 
Influence of salt brine-——'The makers of the Burrell-Law- 
rence-Kennedy machine directed that the teat cups and the 
rubber parts be immersed in a 10 per ct. Salt solution between 
milkings. With this machine the milk from each cow was kept 
separate and samples were taken accordingly. The machine- 
drawn milk from two cows was sampled March 6—20 inclusive 
when the teat cups and rubber parts were kept in brine be- 
tween milkings. Once each week they were scrubbed in a sal- 
soda solution before being returned to the salt solution. From 
March 21 to the close of the test the entire machine was care- 
fully cleaned each day but no part of it was placed in the salt 
solution. The results of the bacteriological examinations are 
given in Table III. 
