The present chemist entered upon his duties July 12, 1890. ; 
The short time remaining between the beginning of his service 
and the close of the year, has precluded the possibility of com- — 
pleting any line of investigation. The present report is, there- 
fore, mainly a statement of investigations in progress, ane of lines 
of work. newly organized. 
in this report : 
I. Summary of analytical work. . 
II. Analyses of cattle foods used in investigation of breeds of © 
dairy cattle. ; 
III. Analyses of milk of cows used in iiveationlnen of breeds . 
of dairy cattle. f 
TY. Description and data pertaining to butter-work connected 
with investigation of breeds of dairy cattle. 
Y. Analyses of fertilizers. 
VI. Experiments with methods of creaming. 
VII. Investigations entered upon and lines of work planned. 
I. Summary oF ANALYTICAL WoRK. 
From the tables below it can readily be seen how many and — = 
what kinds of substances have been analyzed. The period * 
covered by these analyses includes the thirteen months, extend- ; 
ing from November 1, 1889, the date of the last Bilas to 
December 1, 1890. 
In order to show the very rapid increase in amount of work i 
within the past few months, caused by the development of the — 
work connected with the investigation of various breeds of cattle, 
the analyses are presented in two periods, the first period covering 
eight and one-half months, extending from November 1, 1889, to 
July 15, 1890; the second period covering four and one-half 
months, extending from July 15, 1890, to December 1, 1890: 
*L. L. Van Slyke, Ph. D. 
