268 MILK HYGIENE 



one month. The exact time of the procuring shall be with- 

 out previous notice to the dairy. He shall test this milk for 

 the number and nature of bacteria present in it, to the extent 

 which the needs of safe milk demand. He shall also make a 

 microscopic examination of the milk for pus cells. Milk free 

 from pus and injurious germs and having not more than 

 10,000 germs of any kind or kinds to the cubic centimeter, 

 shall be considered to be up to the required standard of purity. 



8. The chemist shall in a similar manner procure and ex- 

 amine the milk for the percentages of proteids, fat, sugar, 

 mineral matter, and water present. He shall also test its 

 chemical reaction and specific gravity, and shall examine it 

 for the presence of foreign coloring or other matters or chem- 

 icals added as preservatives. Standard milk shall range from 

 1.029 to 1.034 specific gravity, be neutral or very faintly acid 

 in reaction, contain not less than from 3.5 per cent, to 4.5 per 

 cent, proteid; from 4 per cent, to 5 per cent, sugar, and not 

 less than 3.5 per cent, to 4.5 per cent, fat in the case of 4 per 

 cent, fat milk, and shall be free from all contaminating foreign 

 matter and from all addition of chemical substances or color- 

 ing matters. Eichness of cream in fat shall be specified and 

 shall vary not more than 1 per cent, above or below the figure 

 named in selling. Neither milk nor cream shall have been 

 subjected to heat before the examination has been made, nor 

 at any time, unless so announced to the consumer. 



9. The veterinary inspector shall, at intervals equal to 

 those of the bacteriologist and chemist, and without previous 

 warning to the dairy, inspect the cleanliness of the dairy in 

 general, the care and cleanliness observed in milking, the care 

 of the various utensils employed, the nature and quality of the 

 food used, and all other matters of a hygienic nature bearing 

 upon the health of the cows and the cleanliness of the milk, 

 including also as far as possible the inquiry into the health of 

 the employees on their farms. He shall also see that the cows 

 are free from tuberculosis or other disease. 



10. The charges made by the experts shall be — for the 

 veterinarian $10.00, and $5.00 for each of the others for each 

 examination ; this amount to be paid by the dairy at the time 



