Standards for Certified Milk. 269 



The milk the specific gravity of which is to be determined is well shaken and poured 

 into a high glass cylinder of suitable diameter; the aerometer is dropped in slowly, in 

 order to prevent its bobbing up and down. (The bulb should be free from adhering 

 air bubbles.) The figures on the stem are the second and third decimals of the numbers 

 of the specific gravity, so that 34 is to be read 1.034. For this examination, the tempera- 

 ture of the milk must be 15 C. (60 F.) ; if it is not, the specific gravity of the milk 

 at 15 C. must be calculated from the specific gravity found and from the temperature, 

 for in milk inspection and analysis this is the standard. 



Methods and Regulations for the Medical Examination of 

 Employees Their Health and Personal Hygiene. 



89. A medical officer, known as the attending dairy physi- 

 cian, shall be selected by the commission, who should reside near 

 the dairy producing certified milk. He shall be a physician in 

 good standing and authorized by law to practice medicine; he 

 shall be responsible to the commission and subject to its direction. 

 In case more than one dairy is under the control of the commis- 

 sion and they are in different localities, a separate physician should 

 be designated for employment for the supervision of each dairy. 



90. Before any person shall come on the premises to live 

 and remain as an employee, such person, before being engaged 

 in milking or the handling of milk, shall be subjected to a complete 

 physical examination by the attending physician. No person shall 

 be employed who has not been vaccinated recently or who upon 

 examination is found to have a sore throat, or to be suffering from 

 any form of tuberculosis, venereal disease, conjunctivities, di- 

 arrhea, dysentery, or who has recently had typhoid fever or is 

 proved to be a typhoid carrier, or who has any inflammatory dis- 

 ease of the respiratory tract, or any suppurative process or infec- 

 tious skin eruption, or any disease of an infectious or contagious 

 nature, or who has recently been associated with children sick 

 with contagious disease. 



91. In addition to ordinary habits of personal cleanliness 

 all milkers shall have well-trimmed hair, wear close-fitting caps, 

 and have clean shaven faces. 



92. When the milkers live upon the premises their dormi- 

 tories shall be constructed and operated according to plans ap- 

 proved by the commission. A separate bed shall be provided for 

 each milker and each bed shall be kept supplied with clean bed- 

 clothes. Proper bathing facilities shall be provided for all em- 

 ployees on the dairy premises, preferably a shower bath, and 

 frequent bathing shall be enjoined. 



93. In case the employees live on the dairy premises a suit- 

 able building shall be provided to be used for the isolation and 

 quarantine of persons under suspicion of having a contagious 

 disease. 



The following plan of construction is recommended: 



The quarantine building and hospital should be one story high and contain at 

 least two rooms, each with a capacity of about 6,000 cubic feet and containing not 

 more than three beds each, the rooms to be separated by a closed partition. The doors 



