THIRTY-SIXTH ANNUAL CONVENTION. 217 



Tables i8 and 19 show why samples of butter taken for 

 analysis do not always agree, even when representing the same 

 churning of butter. 



From the 80 churnings recorded in Table 12, one extra tub 

 was packed from each churning numbered 41 to 52. The analy- 

 ses under churn samples, Table 18, are the same as recorded in 

 Table 13 for these same churnings. The analyses recorded 

 under the average five tubs, are the average of the analyses 

 recorded in Table 13 for the four tubs from each churning, to- 

 gether with the extra tub that was packed from each of the 12 

 churnings. This extra 30 pounds was melted by placing the 

 butter in a milk can, tightly covered. The results obtained by 

 analyzing the sample taken from melted butter show actual com- 

 position of that quantity of butter. The average water content 

 of the 12 tubs melted butter was in this case 0.36 of one per cent 

 higher than that of the average of the trier samples taken from 

 60 tubs, and 0.36 of one per cent lower than the average of the 

 12 samples taken from the 12 churns. 



In Table 19 there is more of a uniformity between trier and 

 melted sample due to frozen condition of butter when the samples 

 were taken. These tubs are the same recorded in preceding 

 tables and used in the regular experimental work. They belong 

 to churnings 41 to 52. When all the tubs were brought out of 

 the storage room in Chicago they were sampled while the butter 

 was still frozen and the result of analyzing the 160 samples is re- 

 corded in Table 13. The 12 tubs to be melted were shipped to 

 Urbana and the samples obtained from the melted tubs in the 

 same manner as for Table 18. The average of the samples taken 

 from the 12 melted tubs was 0.13 of a per cent higher than the 

 trier samples. Trier samples taken after storage contained an 

 average of 0.99 of a per cent less water than the average of the 

 samples taken from the same tubs before storage. This de- 

 crease in w^ter content during storage is nearly the same as the 

 average decrease of the 106 tubs which was 1.09 of one per cent. 



