690 Agricultural Experiment Station, Ithaca, N. Y. 



The Victoria, 75 gallon size, manufactured by Watson, Laidlaw & 

 Co., Glasgow, Scotland. The Dairymen's Supply Co., 1937 Market 

 St., Philadelphia, Pa., agents in the United States. 



All of these with the exception of the Reid's Improved Danish 

 and the DeLaval Alpha Acme, were the same machines that were 

 used in 1894. The Butter Accumulator, the DeLaval Acme Alpha 

 and the Peid's Improved Danish were loaned for the purposes of 

 the school by the respective manufacturers. 



These machines were operated by the students in the Dairj'^ course 

 under the direct supervision of Mr. Jared YanWagenen, Jr., 

 instructor in butter making, each student working in turn upon 

 each separator. None of the tests recorded were made until after 

 the class had been at work for nearly a montli and the students 

 had had a considerable amount of practice in handling the various 

 machines. The milk used was, in all cases, the mixed milk 

 brought to the dairy building by farmers nearby. The milk of 

 the morning and the previous evening was delivered at the building 

 at about 10 a. m. and worked up the same day. It was ordinarily 

 received in good condition but a considerable portion was the milk 

 of "stripper" cows and maybe considered difficult milk to separate. 



As the runs were short, it was not attempted to make the test of 

 capacity by weighing the milk and taking the time of the whole 

 run. After the machine was started and the milk had been running 

 at full head for some little time, a capacity test was made by catching 

 and weighing the skim milk and cream for a certain short definite 

 time. 



Owing to the pressure of work upon the Station chemist, it was 

 not found possible to determine the fat in the skim milk by the 

 gravimetric method as heretofore, and the determinations were 

 therefore made in all cases in skim milk Babcock bottles and by 

 the same person, Mr. J. M. Trueman, an advanced student in the 

 College of Agriculture. The samples in all cases, were taken from 

 the mixed skim milk of the entire run and not caught directly from 

 the skim milk outlet of the machine at any period of the run. The 

 skim milk was caught in 40-quart cans and a portion taken from 

 each can with the Scovell Aliquot Sampler. These portions mixed 

 together formed the sample for analysis. The details of the working 

 of the various machines are shown in Tables I to YI below. 



In general, the mechanical operations of the machines were 

 very satisfactory. They were mounted . on solid stone piers and 



