502 THE CONTROL OF THE MILK SUPPLY 



1. The cows are properly selected, are free from disease, and 

 are tested individually with tuberculin. A weekly inspection of 

 the cows and their stables also takes place. 



2. The employes are under the care of a physician, who 

 examines them once a fortnight. Employes who are indisposed 

 or suffering from infectious disease are not allowed to come to the 

 laboratory or farm, and recive full pay during absence. 



3. The care of the milk is strictly hygienic ; no dirt is allowed 

 to contaminate it, as the stables and cows are kept scrupulously 

 clean. The milk is filtered as soon as drawn ; it is put into sterile 

 bottles and sealed in a clean milk-house 100 yards from the 

 stables, and exposed to the air as little as possible to prevent 

 its becoming bacteriologically contaminated. It is delivered to 

 the consumer a few hours after milking. 



4. The stables and dairy are sanitarily drained, and the cows 

 have 1 500 cubic feet of air space each. 



5. The milk pails are provided with a layer of cotton-wool 

 through which the milk passes before entering the pail. The 

 milkers wear white overalls. 



6. This milk is especially protected against infection. Every 

 vessel used in the milk-house, the milking pails, and milkers' 

 clothing are sterilised before being used, and sterilising apparatus 

 is in use at all times for this purpose. This milk is, therefore, a 

 perfectly safe milk to use in its natural state, and for safety againstj 

 disease needs no sterilising or pasteurising. The laboratory! 

 produces all its own milk, and its cows are all tested with tuber-] 

 culin. This milk is neither coloured or preserved in any way. 



7. A resident bacteriologist and chemist makes periodical! 

 examinations and analyses in the laboratory or the farm. The] 

 laboratory, modifying rooms, milk cooling rooms, sterilising 

 chambers, and washhouses constitute a building by themselves,! 

 separate from the cow stables, and are fitted up with the mostj 

 improved sanitary arrangements and fittings.^ 



of this kind was established in Boston in 1891, under the name of the Walker- 

 Gordon Laboratory. Eighteen or twenty such laboratories now exist ir 

 America, and one in London. The London farm and laboratory is carried or 

 in a similar manner to those in the United States. The farm is situated at* 

 Finchley, and the laboratory in West London. 



^ A full account of the principles and methods of the Rotch system will be 

 found in the Brit. Med. Jour. ^ 1902, vol. ii., pp. 653-672, by T. M. Rotch, M.D. 



It may be desirable briefly to state here the writer's view of the modified 

 milk movement which is represented in England by a branch of the Rotch 

 system (Walker- Gordon Laboratory), and the Municipal Sterilised Milk Depots 



