356 Journal of Agriculture. [8 June, 1907. 



(luring the rear will be issued to the owner by the director of the Experiment 

 Station at the expiration of the testing period if he be satisfied that the monthly 

 reports furnished by the owner and the supervisors of the dairy tests are correct 

 and true, to the best of his knowledge and belief. 



7. When a seven-dav or thirty-day official test of a cow entered for yearly 

 record is conducted, the average \)er cent, of fat on this test may be used for the 

 calculation of the production of butter fat during the month, instead of that ob- 

 tained on a separate monthly test. 



8. Yearly records may begin with llie fo.irth dav from calving, but no monthlv 

 test of a cow shall, as a rule, be made prior to the twelfth day from calving. 



9. No more than eight cows in any one herd shall be tested at one time on 

 monthl)- tests, if the cows are milked three or four times a day, and no more than 

 ten cows where thev are milked twice a day. 



10. The expenses connected with the monthlv tests will be ;^i a month, and the 

 necessary travelling expenses of the supervisors. The latter expenses will be appor- 

 tioned e<]ually each month among the breeders for whom such tests were conducted. 

 A charge of /. i will be made for each certificate of ^■earlv records issued by the 

 station. 



11. All cjuestions not covered by the general rules governing official tests of 

 dairy cows, or by the preceding sjjecial rules for semi-official yearly tests, shall be 

 decided by the officer of the Wisconsin Experimental Station in charge of dairj' 

 tests, whose decision shall be final. 



C- — Directions for Station Kcfresentatives in Conducting Tests of Dairy Cows: — 



1. The station representative shall be present at the last regular milking preced- 

 incr the beginning of the test, and shall satisfy himself that the cow is milked dry 

 a that time. He shall note the hour at which this milking is made, and the final 

 milking of the test shall be made at exacth' the same hour. 



2. He must be present at each and every milking during the test, and satisfy 

 himself that at the close of each milking the pail contains nothing but the milk 

 drawn from the cow on the test. 



3. Under no circumstances shall more than cue cow undergoing test be milked 

 at the same time. The station representative must in every case be in jiosition to 

 observe the milker during the whole milking. 



4. Immediately after the milk is drawn at each milking he will take charge of 

 the pail and contents, will weigh the same on scales provided by the station, and 

 enter the exact weight of milk at once on his records. He will then take a correct 

 sam])le of the milk for his own test and for the composite sample to be sent to the 

 station, in accordance with the directions given below. 



5. As soon as the milk has been weighed, it is thoroughly mixed bv pouring it 

 from one vessel to another, or by means of a dipper, and a pint fruit iar is imme- 

 diately filled about two-thirds full of milk for the test sample. The station repre- 

 sentative takes charge of and is personally responsible for this sample, which is 

 l:e])t under lock and ke\- until tested. The test is proceeded with as soon as con- 

 venient after the milk has cooled to ordinary room temperature. 



6. Eat determinations are always made in duplicate, and the average of the two 

 determinations recorded in the record book. The sample taken of any one milking 

 IS not thrown away until a jjcrfectly satisfactory test of the milking has been 

 obtained. The station re])resentative will enter at once the results obtained on the 

 proDer blanks, in ink or indelible jiencil, on comi)letion of each test. 



7. If any of the milk or the test sample from a milking is accidentally lost, the 

 missing weight or the test credited to this milking is to be obtained bv taking the 

 average of all corresjionding milkings during the whole tests, i.e., if the evening 

 milking is lost or the test sample therefrom, the average of the weights or tests of 

 i-ll evening milkings during the, seven-day test is taken as the yield or the test for 

 the one lost. It must be stated on the re])ort that the data so obtained are esti- 

 mated, and not actual. 



8. ("omjjosite-Test Sample. — At the time the test of the milk is made, a sam|)le 

 comprising as many cubic centimetres of milk as the number of pounds in the milk- 

 ing, is placed in a j)int fruit jar, containing a small rjuantity of ])reservative, for 

 the composite-test sample to be sent to the station when the test is completed. A 

 25 c.c. glass pipette for taking this sample is furnished with each outfit. The 

 station representative shall be responsible for the proper care of the composite 

 sample, and shall send it by express, charges prepaid, immediately on the comple- 

 tion of the test, to Prof. E. W. Woll, Agricultural Experiment Station, Madison, 

 Wis. 



