1915.1 



PUBLIC DOCUMENT — No. 31. 



49 a 



other places where the test is used as a basis for fixing the value 

 of milk or cream. Operators must secure a certificate of com- 

 petency from the experiment station, all glassware used must 

 be calibrated and machines and apparatus must be inspected 

 once annually. 



1. Examination for Certificates. — Nineteen candidates have 

 taken examinations and have received certificates. 



2. Inspection of Glassware. — Six thousand three hundred 

 and thirty-six pieces of Babcock glassware have been tested for 

 accuracy, of which only eighteen pieces were condemned. 



Following is a summary for the fourteen years that the law 

 has been in operation : — 



Year. 



Number 



of Pieces 



tested. 



Number of 



Pieces 

 condemned. 



Percent- 

 age 

 condemned. 



1901 



1902, 



1903 



1904 



1905, 



1906, 



1907 



1908, 



1909 



1910 



1911 



1912 



1913 



1914 



Totals 



1 Average 



5,041 

 2,344 

 3,240 

 2,026 

 1,665 

 2,457 

 3,082 

 2,713 

 4,071 

 4,047 

 4,466 

 6,056 

 6,394 

 6,336 



52,938 



291 



56 



57 



200 



197 



763 



204 



33 



43 



41 



12 



27 



34 



18 



1,976 



5.77 



2.40 



2.54 



9.87 



11.83 



31.05 



6.62 



1.22 



1.06 



l.Ol 



.27 



.45 



.53 



.28 



3.731 



3. Inspection of Machines and Apparatus. — Mr. James T. 

 Howard, as deputy inspector, has visited and inspected the Bab- 

 cock machines and apparatus in 80 creameries, milk depots and 

 milk inspectors' laboratories. Only two machines were con- 

 demned and conditions were found to be satisfactory in most 

 cases. 



