THE MILK SITUATION IN THE DISTRICT OF COLUMBIA. 283 



cream is kept, offered for sale, exposed for sale, or sold in tightly closed and 

 capped bottles or receptacles of a similar character, such as shall be approved 

 by the commissioner of health of the city of Chicago. 



SEC. 2. Any person, firm, or corporation who shall violate any of the provi- 

 sions of section 1 shall be fined not less than $5 nor more than $100 for each 

 offense. 



SEC. 3. This ordinance shall be in full force and effect from and after its 

 passage and due publication. 



RULES REGULATING THE HANDLING AND SALE OF MILK FOB STORES IN BOTTLES 



ONLY. 



[Approved by the city council June 22, 1908.] 



Section 1. No person, firm, or corporation shall sell, offer for sale, expose for 

 sale, or keep with the intention of selling any milk or cream in stones or in 

 other places where other merchandise than milk or cream is sold unless the 

 milk or cream is kept, offered for sale, exposed for sale, or sold in tightly closed 

 and capped bottles or receptacles of a similar character, such as shall be ap- 

 proved by the commissioner of health of the city of Chicago. 



Sec. 2. Any person, firm, or corporation who shall violate any of the pro- 

 visions of section 1 shall be fined not less than $5 nor more than $100 for each 

 offense. 



Sec. 3. This ordinance shall be in full force and effect from and after its 

 passage and due publication. 



RULES REGULATING THE PASTEURIZING OF MILK AND MILK PRODUCTS. 



The following rules shall regulate the pasteurizing of milk and milk products 

 offered for sale, exposed for sale, or kept with the intention of selling within 

 the city of Chicago after January 1, A. D. 1909 : 



Rule 1. Milk and skimmed milk. Milk and skimmed milk shall not contain 

 more than 100,000 bacteria per cubic centimeter from May 1 to September 30 

 and not over 50,000 bacteria per cubic centimeter between October 1 and April 30. 



Rule 2. Cream and ice cream. Cream and ice cream shall not contain more 

 than 200,000 bacteria per cubic centimeter from May 1 to September 30 and not 

 over 100,000 bacteria per cubic centimeter between October 1 and April 30. 



Rule 3. Milk, skimmed milk, butter milk, cream, and ice cream. An original 

 package of pasteurized milk, skimmed milk, butter milk, cream, or ice cream 

 exposed to the temperature of the room for 48 hours and stoppered with a 

 sterile cotton plug shall not show evidences of putrefaction after being so ex- 

 posed. 



Rule 4. Skimmed milk and ice cream. Skimmed milk and ice cream shall 

 give a negative test when treated in the following manner : 



To 5 cubic centimeters of the pasteurized product add 2 drops of a 2 per 

 cent solution of paraphenylenediamin and 1 drop of a 2 per cent solution o 

 hydrogen peroxide and agitate. 



Not more than a tinge of blus shall be obtained, by this test within 30 seconds 

 after mixing. 



Rule 5. Butter. Butter shall respond to the following test : 



Twenty-five grams of pasteurized butter placed in a small beaker and heated 

 by being placed in water at 60 C., the clear butter fat then poured off, and the 

 remaining liquid then diluted with an equal volume of water. The mixture 

 thus obtained is now treated with 2 drops of a 2 per cent solution of para- 

 phenylenediamin and 1 drop of a solution of 2 per cent hydrogen peroxide. 



When thus treated not more than a perceptible blue color shall be obtained 

 within 30 second after mixing. 



Rule 6. Pasteurizing temperatures. All pasteurized milk, cream, skimmed 

 milk, milk products, and milk and cream used in the production of milk products 

 shall be pasteurized in accordance with the following regulations: 



(A) Continuous pasteurization. In all continuous pasteurization the milk 

 and cream shall be heated to a temperature which shall be determined and fixed 

 by the department of health for each machine at a point corresponding to the 

 temperature required to kill 99 per cent of the bacteria and all pathogenic bac- 

 teria contained in the raw product. For this determination ordinary raw milk 



