42 HATCH EXPERIMENT STATION. [Jan. 



The annual inspection of Babcock machines was macte in 

 November of 1!)04. Fifty-six establishments were either visited 

 or heard from, 3(J being creameries and 20 milk depots. Twenty- 

 one, or one-tliird the number, are co-operative, while the other 

 35 are proprietary, or managed by stock companies. Thirty-six 

 machines were inspected. The number is 4 less than last 

 year, due to the fact that 2 creameries and 1 milk depot have 

 been discontinued, and 1 milk depot does not use its tester. 

 Some machines overheated the tests, and a few required addi- 

 tional steam to warm them. One needed slight repairs of the 

 steam gauge, but the others were in satisfactory condition, and 

 in general showed an improvement over last year. Steam was 

 the motive power in every case except one, where electricity 

 was used. All but 5 of the machines have frames of cast iron, 

 which is taking the place of galvanized iron and copper. Of 

 the cast-iron machines, 19 are "Facile," 10 " Agos," and 2 

 "Wizard." The last named has only recently been placed 

 upon the market. As a rule, the glassware was found in good 

 condition, although in a few cases it was very dirty. In addi- 

 tion to the regular inspection, two city milk inspectors were 

 visited. Each had a "Wizard" cast-iron machine, one being 

 run by electricity and the other by a water motor. The elec- 

 trical machine did not have sufhcient power for the necessary 

 speed. The other was in good condition, and a certificate was 

 given. 



6. Tests of Pure-bred Cows. 



This work has increased to such an extent as to render 

 necessary the employment of a regular tester, Mr. Sumner 

 R. Parker of the class of 1904 of this college, who gives it 

 his whole time. The testing is conducted under the super- 

 vision of the American Guernsey and Jersey cattle clubs 

 and the Holstein-Friesian Association. The work consists 

 largely in determining the yearly milk and butter fat yields 

 of pure-bred cows of the several breeds. The inspector 

 visits the farms monthly, weighs the milk for one or two 

 days, determines the butter fat by the Babcock method, and 

 reports his findings to the secretary of the respective clubs, 

 together with such other data, relative to feed, scattered 

 milkings, etc., as are required. These tests are known as 

 "yearly milk and butter fat tests," or "authenticated but- 

 ter fat estimate and milk record." There are at present 



