91 



This experiment shows that the loss of unrecovered butter-fat was 9-9 per cent 

 greater for the morning milk, and 6*22 per cent greater for the evening milk, when 

 the milk was set in deep pails for 11 hours, than it was when the milk was set for 

 22 hours. 



Mxjteriment on the effect of adding Water to Milk in Deep-setting. 



The test was carried on for six days — from 24th September to Ist October — and 

 included six settings of morning milk and six settings of evening milk, or 36 settings 

 in all. The milk used was herd milk, and was mixed in one vessel, before any 

 difference of treatment was given. To one lot, 25 per cent o( water at a tempera- 

 ture of 160° Fahr. was added ; to another lot, 25 per cent of water at a temperature 

 of 60° Fahr. was added ; and the third lot was set under similar conditions with the 

 others, and without the addition of any water. 



The following Table shows the average results from 12 settings in each case; 

 the setting period was 22 hours : — 



Table IV. 



Quantity of uiiUv si t Lb. 



Percentage of butter-fat m u;iik 



Temperature of milk when mixed Fahr, 



do milk when set 



do water in tank 



Percentage of fat left in skim-iuil':v 



Quantity of fat in whole milk Lb. 



do left in skim-milk '• 



Percentage unrecovered 



25 per cent 



of Water 



at 160° Fahr. 



added. 



25 per cent 



of Water 



at 60° Fahr. 



added. 



No Water 

 added. 



25 

 3-52 



02° 



82° 



38° 



•60 



088 



124 



14 11 



35 



3-52 



92° 



92° 



38° 



58 



1-23 



168 



13-67 



ThiB experiment chows that there was practically no appreciable ditferenco 

 (1*15 per cent) between the percentages of unrecovered fat left in the skim-milk, 

 when 25 per cent of water at 160'' Fahr., 25 per cent of water at 60° Fahr., and no 

 water added, were the differences of treatment in the setting oi milk, in deep-setting 

 pails in ice water. 



Four Experiments in the Creaming of Milk from Cows at different stages of Lactation, hy 



the JDeep-setting method. 



For these tests, which were conducted in November, the cows of the herd were 

 divided into three groups, according to the length of time during which they had 

 been milking since the last calving. 



Group I contained the cows which had been milking for periods ranging from 

 8 to 11 months, and was made up of 1 Shorthorn, 1 Shorthorn ^rade, 2 Jerseys, 1 

 Holstein, 1 Devon and 1 Quebec Jersey. 



