No. 33.] 341 
Taking the average percentage of butter yielded from the milk of 
each cow we have of butter produced from Jem’s milk 25.5 Ibs. 
and from Meg’s milk 18.76 lbs. . 
The influence of the quality of the milk on the economy of churn- 
ing is shown by comparing the yield of butter from the richest milk 
of each cow with their average yield. Seventy-two trials made with 
Jem’s milk when the percentage of fat was above 7, gave an average 
percentage ratio of butter to fat in milk of 96., the average for the 
whole period being 95. In thirty-seven trials when the fat was 
above 8 per cent, the average ratio of butter to fat was 101.9. 
With Mege’s milk, forty-one trials when the percentage of fat was 
above five, gave an average ratio of butter to fat of 78.3, the aver- 
age for the period being 66: 
In both cases we find that a larger proportion of the butter was 
recovered from rich milk than from poor. The amount of fat re- 
tained in the buttermilk is probably about the same with rich as 
with poor milk, but the effect of this loss on the percentage of butter 
obtained is greater with the milk containing the least fat. 
Influence of time of setting on the yield of Butter: 



: Jem. 
24 hours and under. 24 to 48 hours. Over 48 hours. 
aT A? eB <1 oo Se — + 
rita = 5 a se 
- © 3 + e re < x “es 
: #3 = tae 3 3 oe : B87) OS 
= oS mB} 32 = = ha 5 3 eS 
m5 ae op mS 2s ° a gr 4 
=e a cS rH a a ro oy ca 
8 5-44 73.5 30 7.48 122.5 54 7:74 103.2 
8 4.50 92.1 30 6.93 96.6 54 6,69 100.5 
14 5.30 82.7 30 6.83 975 54 702 gI.2 
21 3.75 58.2 36 7.26 120.6 54 8.02 103.1 
24 2°70 38.9 36 7.55 95-9 54 8.64 106.5 
24 4.62 86.8 36 43,22 159.1 54 7.62 LIA. 3 
ae Fea as SARE 36 7.42 gI.5 54 g.11 107.3 
ph te fel os 42 7.42 Q7.1 54 9.19 104.0 
44 8.56 IOI.5 54 8.58 89g. 
44 8.21 128.1 54 9-52 III.5 
48 5.99 100.5 54 + 7.91 106.6 
48 5.85 99.2 54 8.12 114-4 
48 6.73 93-3 54 6.64 103.0 
48 7.56 TII.O 66° 8.35 99.1 
48 4.11 62.1 66 8.35 102.0 
48 6.55 113.8 66 7.76 Lie, 
48 6.54 104.4 72 8.47 105.9 
48 6.62 99-5 72 4.82 70.2 
48 6.30 100.6 72 9.14 101.2 
48 5-47 87.9 72 6.43 78.7 
48 7.36 89.5 72 5.83 81.5 
48 7-64 93-9 78 8.83 99.6 
48 7.10 Q7.2 96 ) O 
PMERACC iiss ss 3's 5 TPE ap OE hak AR IE WOZ Geer F Re ars seins twee ees 95.8 
