42 HATCH EXPERIMENT STATION. [Jan. 



cock machines, very full information concerning the method 

 of manipulating the Babcock milk test, together with as 

 complete a list as possible of the creameries and milk depots 

 in Massachusetts. This bulletin was sent in lots of from 10 

 to 100 to all milk depots and creameries in the State. 



Inspection of Glass7vare. — All glassware found to be cor- 

 rect is marked " Mass. Ex. St.," by means of sand blast. 

 During 1902 there was examined 2,344 pieces, of which 56 

 pieces, or 2.39 per cent., were found incorrect. There have 

 been examined the present year (1903) 2,240 pieces, of 

 which 57 pieces, or 2.54 per cent., were not correctly gradu- 

 ated. Manufacturers are now very careful concerning the 

 accuracy of the glassware put out by them. 



Examination of Candidates. — Mr. E. B. Holland has con- 

 tinued as heretofore to have charo;e of this work. Durino; 

 1901, 45 candidates were examined ; in 1902, 13 candidates; 

 and the present year, 17 have been given certificates of 

 competency. It is believed that practically all parties now 

 operating Babcock machines under the law have a good 

 understanding of the principles of manipulation, and are 

 capable of doing accurate work. 



Inspection of Babcock Machines. — The inspection of 

 machines the present year has been in charge of Mr. Albert 

 Parsons, who makes the following report : — 



The third annual inspection of Babcock machines was made in 

 November and December, 1903. Fifty-two establishments were 

 either visited or heard from, 37 being creameries and 15 milk 

 depots. Twenty-four, or half the number, were co-operative, 18 

 were proprietary, and 10 were managed by stock companies. 

 Forty machines were inspected. Of these, 1 was condemned and 

 6 needed slight repairs. A few overheated the tests, and a few 

 required additional steam to warm them. All but two of the 

 machines were run by steam power, one was run by hand and 

 one by electricity. About three-fourths of the machines have 

 frames of cast iron, while the other fourth is equally divided 

 between galvanized iron and copper. Of the cast-iron machines, 

 23 are "Facile," and 9 are " Agos." As a rule, the glassware 

 was found in good condition, although in some cases it was very 

 dirty, in a few cases it was not tested, and a few pieces bore the 

 mark of another State. 



