124 STORRS AGRICULTURAL EXPERIMENT STATION 
from contact with the stable air, while in the latter case a cer- 
tain amount of dust and bacteria could drop into the four inch 
opening in the covered pail. Contrary to expectation, the 
germ content of the machine drawn milk continued to be 
+ 

TABLE 32. 
Comparison of hand and machine drawn milk. After 
washing all rubber tubes and teat cups placed in a 3.5 per 
cent. solution of formalin. 
















Se “bo 3 3 ed Ei S = = 
7 ah = i Sue £ 
pate [Be| Methodot) a) 28 | Be | eye | Bue | gs 
GR n 5 
oe ee 3 Bs 8 et mo 
1906 Machine |p. m. 570 220 0 0 | 64* 
Jan. 23 |497| Hand |p..m.| 2,250 960 16 375 | 53 
Jan. 24 |499|/Machine |a.m.| 24,330 6,830 120 | 1,830 | 64* 
Hand /|a.m.| 18,950 2,730 225 1, 50057 
Jan. 24 /560/Machine |/p.m.| 5,710 960 360 120 | 64* 
Hand |p.M. 875 37D 8 100 | 64* 
Jan.'25 |512;/Machine /a.m.| 7,275 1,260 110 350 | 64% 
Hand |a.m.| 5,025 | 1,100 60 680 | 50 
Jan. 25 |519)Machine |p. m. 3,650 750 20 160 sae 
Hand |p.m.} 3,850 520 20 50 |-82 
Jan. 26 |521|Machine |a.m.| 5,520 rhe 90 200 | 64% 
Hand |a.m.| 6,225 970 yAgp 60 | 64* 
Jan. 26 |526|Machine |p.m.| 2,525 480 125 170 | 64* 
Hand) heya 23225 910 0 375 |100 
Jan. 27 |528/Machine |a.m.| 12,400 2,560 160 250 | 64* 
: Hand |a.m.| 11,440 2,340 40 “5 2De aie 
Averages |Machine LAO T: 1,791 123 335.10 65 
Hand 6,355 1,238 48 458 | 63 

higher than that of the hand drawn milk in the majority of 
cases, as may be seen in Table 32. | 
By the use of the connectors with the direct air intakes, 
the surging of the milk in the tubes was practically stopped, 
and it was believed that there must be some other explanation 
for the higher germ content of the machine drawn milk. 
EIGHTH TREATMENT OF THE MACHINES. 
_At each pulsation of the machine, the air rushes in and re- 
lieves the vacuum in the teat cup. It was thought that pos- 
sibly some bacteria might be drawn into the milk with the air 
taken in from the stable atmosphere. In order to determine 
this, a thin layer of absorbent cotton was placed in the air 
