MILK SURVEY OF THE CITY OF ROCHESTER 89 



It has often been pointed out in the past that large producing cows 

 produce milk more cheaply than small producing cows. 



It was recognized that one of the most important branches of the 

 study of milk production should aim to bring out this difference. There- 

 fore, all of the farms have been classified according to the volume of 

 milk which they produced per cow each year, from less than 4,000 Ibs. 

 per cow to more than 9,000 pounds per year. Their average production, 

 the number of farms in each group, the average number of cows per 

 farm and the cost of. production per 100 pounds and per quart of milk, 

 are all shown in Table No. 37 : 



TABLE No. 37 

 EFFECT OF PRODUCTION PER COW ON COST OF PRODUCTION 



It is obvious, that as in past investigations of this kind, the small 

 producing cows produce milk at a much greater expense than the large 

 producing cows. Thus, in the last column, it is to be noted that farms 

 having cows producing an average of less than 4,000 pounds per year, 

 produce milk at a cost of more than 15 cents per quart, while farms having 

 cows producing an average between 8,000 and 9,000 pounds a year, pro- 

 duce milk at a cost of about 8 cents. Cows producing over 9,000 pounds 

 per year, apparently produce milk at a slightly higher cost than cows be- 

 tween 8,000 and 9,000 pounds. This irregularity is a circumstance which 

 may be due to unusual irregularity in costs, or to the fact that there were 

 too few farms in the last group. 



In Table No. 38 is shown the relation of the production per cow to 

 the hours of human labor and to the cost of labor : 



TABLE No. 38 

 RELATION OF PRODUCTION PER COW TO LABOR 



HOURS OF HUMAN LABOR 



Production Per PerlOOLbs. Rate . Rate 



Per Cow. Cow Milk. Charged. Received. 



4000 or under 170 6.0 $0.363 -W%>\ 



4001 - 5000 ! 192 4.1 .361 



5001-6000 196 3.6 .347 + .085 



6001-7000 213 3.3 .330 + .137 



7001.8000 233 3.1 .349 .152 



8001 - 9000 221 2.6 



Over 9000 ... 266 2.7 .387 + .232 



