Relation of Bacteria to Market Milk. 91 



city for the purpose of selling must be free from dirt r 

 foreign material, and sediment. Not more than a per- 

 ceptible sediment shall be left on a piece of white linen 

 cloth four inches square when a quart of well mixed milk 

 is strained through it. Milk on arrival in the city must 

 not contain more than one million bacteria per cubic 

 centimeter from May first to September thirtieth and not 

 over five hundred thousand per cubic centimeter between 

 October first and April thirtieth. Milk for delivery to 

 the consumer shall not contain an excessive number of 

 bacteria. The sale of milk containing over three million 

 bacteria per cubic centimeter is prohibited and the dealer 

 selling or offering for sale such milk shall, after three ex- 

 aminations of his milk by the bacteriologist and showing 

 bacterial counts above three million be prohibited from 

 selling milk until the method of production and handling 

 of his milk supply has been properly regulated by the de- 

 partment. The sale of -milk containing tubercle, ty- 

 phoid, diphtheria, and other pathogenic bacteria is pro- 

 hibited. The sale of milk containing excessive numbers 

 of putrefactive and gas-producing micro-organisms is 

 prohibited. 



