128 STORRS AGRICULTURAL EXPERIMENT STATION. 
flow or butter fat production. Cows are often covered with a 
swarm of flies, and yet apparently suffer little annoyance. It 
has occurred to the writer that the fly may often feed upon the 
liquid excretions of the skin, and act asa scavenger rather than 
as a blood-thirsty villain. 
Table 51 shows the milk flow of Group I. for the second week 
of each period. ‘The average for the two periods when sprayed 
was 911.6 pounds of milk, and 904.1 when not sprayed. 
Table 52 shows that Group II. gave 900.9 pounds on an 
average for the two periods when not sprayed, and 874.6 when 
sprayed, or 26.3 pounds less when sprayed. 
TABLES 2: 
Butter Fat Yield of Group [. 190}. 


Average of 



















Not Ist and 3d 2nd period. 
NAME OF Cow. Sprayed. Sprayed. : Not 
Sprayed. an. Sprayed. 
ij AOS - 5.41 5.15 5.02 5.21 5.15 
Molly 2nd, - - 4.87 A447 4.20 4.53 4.47 
Molly, - : 6.48 6.25 5.78 O2ts 6.25 
Stelline, - - 2.62 2.01 T3275 2°15 2.01 
Hay Me, - - 3.08 3.02 2.59 hs 3.02 
Betitey - - 5.607 4.01 3.09 4.38 4.01 
Ethel’s Fancy, - 4.82 4.14 4.14 4.48 4.14 
Mina, - - - 6.79 6.89 5.91 6.35 6.89 
Eurotas,. - - 5.53 5.52 5.76 5.64 5.52 
45.82 41.46 38.24 42.01 41.46 
TABLE 54. 
Butter Fat Yield of Group 11. 
een wot | |e ee 
oO t iod. 
NAME OP Cow. Sprayed. Sprayed. Sprayer periods: Not “Spravee 
Sprayed, 
Naomi Boer = 4.05 3-49 3.45 3.75 3-49 
Barberry B, - 4.21 4.06 3.41 3.81 4.06 
Janes, - - 6.62 6.34 6.50 6.56 6.34 
Picterticws = - 6.53 5.86 5.28 5.90 5.86 
Bell, - - - 6.97 Tat Ger. 6.87 yee hi 
Copper A., - - 6.52 6.29 6.09 6.30 6.29 
Lady D., - - pM 1.65 1.44 1.83 1.65 
Reb: 2nd, - - 4.84 5.26 5.82 5.33 5.26 
Brownie, - - 4.70 “<A. S47 4.60 4.65 4.87 
46.66 45.13 43.36 45.00 45.13 




