162 Report oF THE DIRECTOR OF THE 
The Activity of the Physiological Processes. 
In the tenth annual report of this station it was stated that : 
in the secretion of milk, we have a ready and comparatively accu- 
rate means by which to measure the rapidity of physiological 
processes. We have seen that several cows under experinient 
secreted night and day an average of seven-tenths of a poand 
of miik each hour, or nearly 19.6 cubic inches of milk. As an 
average of over 150 determinations with the milk of the fifteen 
animals of the six breeds, we learn that there were ih one-tvn- 
thousandth of a cubic millimeter of milk an average of 152 fat 
globules, and a little calculation will show that by each of these 
-aniinals there were secreted each second an average of 136,000,000 
globules of fat. 
Very closely corroborating the above, we find this year the 
avcrage milk yield for the twenty-three cows under experiment | 
those mornings when the milk samples taken for microseupic 
analysis, was 9.39 pounds per cow, or .7826 pounds per hour for - 
the twelve cows before milking. The average number of glob Jes 
counted in 586 counts was 144.6 for each .JOUL c. m m. and this 
shows the average secretion of 138,210,009 globules per cow 
per second, a result remarkably in accord with that obiained 
previously. 
Certain Changes Taking Place in the Silo. 
It bas seemed that by placing in stout bays weighed portions 
of the corn, sorghum or other material with which the silo is 
being filled, or the changes in which it is desired to investigate, 
and placing such bags in different. parts of the silo while filling, 
that a convenient means was at hand for studving such changes 
as aiso to determine the uniformity or variation which might 
exist in different localities in the silo, and for this purpose we 
made use for this series of experiments of the ordinary grain 
bag, each holding fifty pounds of the freshly cut material, each 
bay labeled with lead tags and the location of each, the character 
and weight of contents was carefully recorded. Whenever, in the 
