268 ReEpoRT OF THE CHEMIST OF THE 
“Some of the Solved and Unsolved Problems of Dairying,” at 
Oneonta, in December, 1894, before the annual convention of the 
New York Dairymen’s Association. 

IV. CHARACTER AND EXTENT OF INVESTIGATION 
RELATING TO DIFFERENT BREEDS OF DAIRY 
COWS. | 
In undertaking this investigation relating to the different 
breeds of dairy cattle, it was the original purpose to publish the 
results at regular intervals; but it has been found impracticable 
to carry out the original plan, since it has been found impossible. 
to control all the conditions of experiment as completely as was 
at first expected. While the original plan contemplated work 
with four individuals of each breed, it is our hope that we may 
continue the investigation until we have worked with a much 
larger number of each breed. As our data accumulate they will 
become more valuable and will yield more definite and reliable 
results in respect to many questions which are now among the 
unsolved dairy problems. mil F 
A few of the animals, whose records have appeared in previous 
reports, have died, whileafew have been found to be in condition 
more or less abnormal and unfitted for further investigation as 
representative animals of their respective breeds; and, in place 
of these animals, young heifers have been substituted. There 
has been an occasional abortion, which hus caused us to omit the. 
publication of the results of that period of lactation. Owing to 
all the different causes which are not unfamiliar in regular dairy 
experience, the investigation has not progressed as rapidly as was 
at first anticipated. However, it will be seen that good progress 
has been made, all things considered, and the data already on 
hand emphasize the increasing value and importance of the 
investigation. Before taking up a presentation and discussion of 
our results, we will consider some points that need preliminary — 
explanation. 
In this report on the cost of milk production we shall icing: 
and discuss the following topics: 
1. Unit of time adopted for comparison. 
2. Tabulated statement giving ages and dates of calving of 
different cows. 
wr, 4 
