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

 necessary sample and must retain the sample under absolute control 

 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 beginning 

 of the test record in duplicate 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, by 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. All the butter fat tests and weights of milk secured by a 

 supervisor shall be recorded by him in a suitable record book or upon 

 special blanks furnished for that purpose, which he shall retain 

 constantly in his possession until called for by the Experiment 

 Station official in charge of the work. 



1 1 . The supervisor shall adhere to the foregoing rules in every 

 particular as well as to the rules of the various breeders' associations 

 under which he may be working. 



Special Rules 



The owners of pure bred animals under test are advised to 

 thoroughly familiarize themselves with the rules under which their 

 respective associations are working. Our supervisors are instructed 

 to refer all questions in regard to rules to the proper pure bred cattle 

 associations. The information in this circular is simply intended to 

 supplement the rules of the various associations and in no way to 

 conflict with them. The supervisor is not at liberty to decide as 

 to which stipulations contained herein are essential and which are not 

 and any apparent variation between the instructions in this circular 

 and those of the pure bred cattle associations should be referred at 

 once to the Experiment Station. 



