38 Repokt of the Department of Bacteriology of the 



In this former study the two factors, publicity and the financial 

 stimulus, were so closely united that it was not possible to estimate 

 accurately their relative importance. 



As the result of changes in conditions, for which the authors 

 are in no way responsible, it is now possible to observe the results 

 from removing the financial stimulus to the production of cleaner 

 milk while practically every other element in the situation remains 

 unchanged. This publication is designed to show the results of 

 the removal of this stimulus as measured by the sanitary conditions 

 surrounding the production of the milk supply. 



It is generally recognized that the scores given to a dairy by two 

 inspectors will vary somewhat even when scoring according to the 

 same card. Accordingly, before making any deductions from the 

 present and former scores it is well to consider whether they are 

 comparable. 



The method of arriving at the scores in the former publication 

 has already been given. In the present statement the facts regard- 

 ing the dairy conditions have been obtained by one of us (B) and 

 the rating of these conditions has been fixed by the other one (H). 

 It is true that the facts regarding the lapse of time since the last 

 tuberculin test, the prevalence of cobwebs and litter in the stables, 

 the number of cows which were incrusted with their own dried 

 excrement, the temperature to which the milk was cooled and similar 

 information were collected by two different individuals. However, 

 since these are questions of fact which can be readily and quite 

 accurately determined, there is no reason to think that these observa- 

 tions by the two men differed in any important particular. Since 

 the valuations of these facts were made by the same individual 

 in both cases, using the same standard of cuts for undesirable con- 

 ditions, it seems safe to conclude that the two sets of scorings are 

 fairly comparable. 



Accordingly, the contrast between the actual conditions of milk 

 production where the financial stimulus toward cleaner milk pro- 

 duction was present and where it was absent is offered as a contri- 

 bution toward the solution of the vexed question of better city milk 

 supplies. 



BASIS OF SCORING. 



The score card which has been used throughout the entire study 

 of this milk supply and upon which the contracts between the 

 producers and the retailers were based is the one devised by Dr. R. 

 A. Pearson while he was at the head of the dairy department in 

 Cornell University and is known as the Cornell University Dairy 

 Score Card. The front and the back of this score card are shown 

 on the following two pages. 



