MILKING MACHINES 125 
relief in the teat cup connector shown in Fig. 41. A cotton 
filter was also placed in the air relief on the head of 
the machine where a portion of the air is taken in at each 



TABLE 33. 
_Comparison of hand and machine drawn milk. Pre- 
vious formalin treatment continued. Cotton filters used on 
machines. 

















8 2 BY a a wea | fa | @. 
®.&| Method of | o:5 So Moe a B.S | ah 
Date |% ope 4 es) Oo. Ao + coor Oro 
¢o| Milking | &m Rs) <Q S30 | mx 0 2% 
an es) Ss ga | Mom) OS | 
1906 Machine |A.m.| 2,120 50 16 67 |132 
Jan. 29 |530) Hand |a.m.| 8,700 1,000 0 900 | 40* 
Jan. 29. |533}Machine |p. M. 380 80 16 75 | 47 
Hand» jprmi (2,150 1,090 0 LiPAsy | oH) 
Jan. 30 |535)Machine jA.m.| 2,580 1,120 33 1b0sios 
meliand |A. M.) 10,830 2,500 33 330 | 40* 
Jan. 30 |540|Machine jp. m. 760 550 16 165 | 48 
HandsiiPeM. . 3,875 600 16 185 | 39 
Jan. 31 |542)Machine |A.m.| 2,425 890 42 260 | 56 
Hand (jA-mii)) 7,750 2,650 0 100 | 40* 
Feb. 1 |548)/Machine |A. M. 870 450 0 42 | 88* 
Haridiya.ms 77,700 1,700 23) 500 | — 
Feb. 1 |553|Machine |p. m. 1,070 280 42, 25 | 79% 
; Hands ipo um 7,760 1,280 25 S/OnleoO 
Feb. 1 |558)Machine |p. m. 1,040 . 350 0 30 |120 
Hand |p.) 2,510 475 0 160 |127* 
Feb. 3 |560|Machine |A.oM. 800 110 50 90 |181 
Hand |a.m.| 3,050 840 0 125s eo 
Feb. 5 |562)/Machine |A.M. 1,900 p25 0 50 | 86 
Tland::|aom.| 1,990 560 50 260 | 64* 
Feb. 5 |564/Machine |p. M. raul) 300 8 257099 
Hands |pams, °2,025 810 66 310 |101 
Feb. 6 |566/Machine |a.m.| 4,650 2020 0 115 | 88* 
Hand |a.m.| — 3,620 1,575 0 135 | 85 
Feb. 6 |584|Machine |p. M. 160 135 0 8 
Hand |p.m.| 1,325 535 8 85 
Feb. 9 |586/Machine |A.M. 120 17 0 0 
. bland aj|AlM. {3,770 1,015 0 190 
Feb. 9 |594|/Machine |p.m.) 4,085 ova 0 100 
Hand\P2M.| 1,350 500 50 300 
Averages |Machine 1,578 622 14 80 | 72 
pulsation. By using the cotton filters in this way, all of the 
air which gained access to the milk had to pass through the 
cotton, which would prevent the bacteria from passing through. 
