128 STORRS AGRICULTURAL EXPERIMENT STATION 
as these experiments go, the formalin treatment is the only 
one which seems to be efficient in sterilizing the tubes and 
which does not at the same time injure the rubber. By thor- 
oughly rinsing the tubes just before use the formalin is so 

TABLE 35. 
Comparison of hand and machine drawn milk. After 
washing all tubes and teat cups were placed in a solution 
made of 1 pound lime in 2 pails of water. Connectors with 
air-relief used but no cotton filters. 


















6 : oy a a oes ga | >. 
8 £| Method of| of S35 MoE sO Berg | sm 
Date Q'S tease 4 oes os oO Gor Oe 
eo) 
1906 Machine |A.m.| 51,140 150 317 158 | — 
Sept. 20/921) Hand |a.m.| 4,750 510 100 367 | — 
Sept. 20 |926|Machine |jp.m.| 14,130 4,650 275 583 | — 
Hand |p.M. 980 600 33 442 | — 
Sept. 21 }928)Machine |aA.M.| 15,900 3,460 | 2,667 942 | — 
Hand |a.M:| 2,775 1,740 0 550 | — 
Sept. 24 |985/Machine |p.M.| 39,430 3:350 550 |5,150 | 63 
Hand |p.m.| 4,010 1,700 0 100 | 68 
Sept. 25 |937)/Machine |a.M.| 5,230 1,100 500 | 1,300 | 65* 
Hand A.M) .9:270 2,000 84 800 | 41* 
Sept. 25 |941|Machine |p.M.| 5,600 1,000 300 3003) 395% 
y Hand |p.m.| 5,400 3,000 50 400 | 50 
Sept. 26 |943)Machine |a.M.| 327,600 | 293,200 400 880 | 65* 
Hand /|a.M. 4,200 300 He 400 | 41* 
Sept. 26 |945|Machine |p.M.| 16,130 10,020 0 466 | 65 
Hand |p.M. 320 130 0 100 | 49 
Sept. 27 |947|Machine |a.m.| 94,700 1,725 575 575 \ 41* 
Hand |a.m.) 24,030 22,430 too 300 | 41* 
Sept. 28 |953/Machine |a.M.| 49,230 4,480 | 1,233 | 3,633 | — 
and |A.M.| 6,320 1,320 83 330 | — 
Sept. 28 |962|Machine |p.M.;| 6,080 3,960 120 540 | — 
Hand |p.m.| 2,940- 2,400 0 17 | — 
Averages |Machine 55,367 29,731 6380 | 1,320 | 59 
Hand '  §,908 3,296 45 164 | 48 


completely removed that no trace of it could be found in 
the milk, even by the most sensitive chemical test. 
KEEPING QUALITY OF THE MILK. 
In many of the experiments, the keeping quality of the 
milk was determined by the number of hours which it would 
keep before curdling, when kept at a constant temperature of 
70 F. It may be seen by studying the tables that in the ma- 
