4. A cow must be milked out at a single sitting. In no case will 

 it be allowable to go back and strip her a second time. 



5. The supervisor shall verify the weight of the pail before each 

 cow is milked. As soon as a cow is milked the supervisor shall take 

 charge of the pail and its contents and keep it under his control 

 until he shall have weighed the milk and taken the sample for the 

 Babcock test. He must thoroughly mix the milk previous to taking 

 the necessary sample and must retain the sample under absolute con- 

 trol until tested. 



6. Disturbing conditions such as sickness, being in heat, change 

 of milker, etc., must always be entered on the report. 



7. When required, as indicated on the blanks furnished, the 

 supervisor must also record the date of the cow's birth, when last 

 calf was dropped, when the cow was served, when test was begun, 

 statement of kind and amount of feed both grain and roughage, 

 method of feeding, also the use of condiments, condition powders, 

 or drugs of any kind. 



8. In the case of yearly tests the supervisor shall at the begin- 

 ning of the test record on blanks furnished him for the purpose a 

 full description of the animal entered for test. 



9. Any tampering with a cow under test or with the samples by 

 the owner or an employee, or refusal to comply with the rules must 

 be reported at once to the station by telephone. Lack of proper 

 apparatus or facilities for doing satisfactory work should also be 

 reported. 



10. As soon as possible after the completion of the test or at least 

 once each month, the supervisor shall bring or send to the station on 

 the proper blanks a detailed report over his signature and affidavit. 

 He shall also submit an itemized statement of time and expenses at 

 each place, number of records sent in and breakage. In case of 

 tests of over thirty days' duration he shall submit such a report on 

 the first day of each month. 



11. All the butter fat tests and weights of milk secured by a 

 supervisor shall be recorded by him in a suitable record book, which 

 he shall retain constantly in his possession until called for by the 

 experiment station official in charge of the work. 



