134 THE MICHIGAN ACADEMY OE SCIENCE. 



fed onl}^ upon fresh grains and fresh fodders, except that "sweet 

 ensilage'' may be employed as a succulent food but not as the basis of 

 the feeding. The cows must be kept clean, housed in a clean well ven- 

 tilated barn, enjoy an abundance of sunshine and exercise and be treated 

 as it is wise that we should treat the foster mothers of the human race. 



10. All water used upon the farms and in the laboratories must be 

 subjected to constant scrutiny. The water the cows drink, the water 

 used in rinsing the vessels, and all the water used in a boarding or 

 tenant house, should be regularly examined by the bacteriologist, but 

 the vessels employed for and about the milk must be sterilized after 

 thev have been washed and Yiused and as near as possible to the time 

 of filling. 



11. All dust, whether from hay or other feeds from the fields and 

 roads, should be as far as possible excluded from the milk house, the 

 barn, and especially so, at the hours of milking and bottling. 



12. Cow's excrement, wet or dry, is the chief enemy of safe milk. It 

 must be excluded from the milk and cream. The milking stools are a 

 fertile source of contamination, therefore thev must be cleansed dailv. 



13. The manager is required to be a practical man, but also he must 

 have enough knowledge of bacteriology as is applicable to the dairy to 

 carry out the rules and regulations of the company. 



Such are the rules of the Walker-Gordon farms. The rules of the 

 laboratories are so generally similar that they need not be further 

 mentioned except to say, keep everything clean, bacteriologically. Do 

 everything as promptly as possible. Keep everything as cool as fifty 

 degrees F. 



Take great care in all operations, for a baby's life may depend on 

 your carefulness. In conclusion it is worthy to note that, in all the 

 vast work of the laboratories and farms, no suspicion has as yet been 

 reported of an infectious disease carried from one nursery to another 

 by the means of the laboratory, nor an infectious disease communicated 

 from any one of the farms to the consumers. 

 Ira O. Johnson, 



Walker-Gordon Laboratory, 

 Grand Rapids. 



