

MILKING MACHINES 25 
efficient in destroying the bacteria in the tubes. F requently © 
they were found to be absolutely sterile, while in other cases 
an occasional organism was found, but in no case were there 
enough bacteria found in the tubes to have any effect on the 
germ content of the milk passing through the machine. 

AB PE -3t 
Comparison of hand and machine drawn milk» After 
washing all tubes and teat cups placed in a borax solution 
(1 pound borax in 15 quarts of water) till needed for use. 













ie 2 mE s « | ofs Ee 
2. | Method of o'9 35 35 aut ® Ee 
Date E 5 Milking ES ee a8 g23 = ave 
zi = ea) fea) cies fsios 
Jan. 14 458.| Machine | p.m. | 31,580 TOU Aeo.t00 40) 
Hand Pom. bl O00 |) 4,450 40 ia2p 
anil 460 | Machine PM eat) 200 1,040. | 2,960 60 
Hand P.M. 6,660 | 2,485 60 LOS 
Jan. 16 4262 enovlachines | (AvM. (177715 .1.:2,100 1,550 835 
Hand , | a.oM. 6,075 1,600 0 440 
Jan. 16 465 | Machine, | P.M. 8,035 1,600 215 900 
; . hana Pewee lo vit leo lo 35) 875 
Jan. 17 467 | Machine ALM. 1620-085 3,210 1,865 265 
Hand A.M. 9,379 185 oo 500 
anes \ / 474 | Machine | P.M. 9,600 1,000 1,460 380 
Hand P.M. 6,640 610 90 200 
Jetelow) 470 ) Machine.) A:m. | 12;500 |.2,420 780 620 
Hand A.M. 3,010 460 0 335 
Jan. 18 481 | Machine | P.M. 4,215 850 1,065 65 
Hand PoM, 251/500 ‘eyes 60518,290 
Jan. 19 483.| Machine | a.m. |.21,265 | 4,115 T,(50 700 
Hand ACM. 5,035 1,140 Vis: 690 
Jan. 20 Aafmpeblachine.- AuM. | £8,900.) 2,435.) 2.015 265 
Hand A.M. SOLO WO, O00 O-) 2,960 
Jane21 489 | Machine | p.m. | 46,300 650; +13;250 0 
Hand P.M. 9,040 | 2,920 290 400 
peat | 493 | Machine | p.m. | 15,415 | 2,485 oto 165 
Hand P.M. Bi41) 1,500 0 720 
Averages Machine Pal7-Sih sviel Save 2320 362 
Hand S/O alee Leo 56 1,065 


It seemed to the writer that the milk drawn through the 
machines when they were thoroughly sterilized should contain | 
a very much smaller number of bacteria than milk drawn into 
the covered pail which was used in these experiments, since 
in the former case the milk passed directly from the udder into 
the closed pail through closed tubes and was entirely excluded 
