MILK SURVEY OF THE CITY OF ROCHESTER 



183 



EMPTY CONTAINERS RETURNED FROM ROUTES 

 a - PER CENT. OF BOTTLES RETURNED DIRTY. 



Per cent. No. Per cent. No. Per cent. No 



* } ? 2 20 5 



ft \ 5 7 25 5 



K3 2 8 2 40.. 



1 9 10 20 50 



2 is 12 : 2 6o::::::::i 



3 2 13 1 80... 2 



15 3 



b. PER CENT. OF CANS RETURNED DIRTY. 

 Per Cent. No. 



100 9 



30 1 



.- 5 



c. WHAT STEPS ARE TAKEN TO INSURE CLEANSING BEFORE RETURN BY CUSTOMER? 



Instructed to rinse bottles 5 



Homes visited Drivers held responsible ..... I 



Nothing 38 



d. WHAT Do You Do IN REGARD TO EMPTY RECEPTACLES FROM INFECTED HOMES? 



Never had any 1 



Nothing .. . i 



Refuse 8 



Do not remove them 18 



From the summary of these reports it will be seen that in most in- 

 stances the building and equipment of the city milk plants are in good 

 condition. Among the exceptions worthy of notice are the following: 



(1.) In only 26 factories is a common towel prohibited. The use of paper 



towels is to be recommended where the cost of cloth hand towels is too 



expensive. 

 (2.) In only 34 of the 132 factories visited were the employees dressed in 



white, washable overalls. 

 (3.) Only 44 of the factories were provided with screens in the windows 



against flies. 

 (4.) In only two factories was milk received in a separate room from the 



other operations. 



(5.) In 53 of the plants visited the glass bottles are not sterilized. 

 (6.) In 25 of the plants the milk cans are not sterilized, and in 40 of them the 



lids of the cans are not sterilized. 

 (7.) In 44 of the factories the apparatus used is not sterilized. 



THE PASTEURIZATION OF MILK 

 Four factories were heating the milk not above 140 degrees. This is 



lower than the temperature decided upon by the highest authorities as 



necessary for the destruction of bacteria under commercial conditions. 

 In five factories the milk pasteurized by the Holding method was not 



heated above 140 degrees, which is a temperature too low for effective 



results. 



All of the factories are using the Holding method of pasteurization. 



All but one held the milk for 30 minutes at the highest temperature, 



