
New YorK AGRICULTURAL EXPERIMENT STATION. 148 
Microscopie EXAMINATION oF MILK. 
The first two tables following present the average number of 
milk globules actually counted and their relative sizes during each 
month of lactation for each breed ; and the tables next following 
present these results per thousand globules for greater ease of 
comparison; and another table gives the general average of these 
results for all the breeds. 
It will be observed that, as the period of lactation advances, the 
relative number of the smaller globules increases with considerable 
regularity, and especially is this the case up to the twelfth month 
of lactation, after which the number of animals for comparison 
dropped off. In contrast it will be seen that the relative number 
of the larger globules, especially those from three to six divisions 
upon the micrometer scale in diameter, steadily diminish as 
lactation advances. 
The average results giving the number of globules of different 
sizes present in 100 globules and extending during the entire 
period of lactation is highly interesting, as showing a close rela- 
tion between certain of the breeds in the character of their 
products. These average results are here brought together for 
comparison. 
AVERAGE SIZE AND NUMBER OF GLOBULES. 











0-1 1-2 2-3 3=4. 4-5 5-6 
Holstein-Friesian ......... 145 546 245 51 if 2 
Naa 0 oS Pa MR oo 146 540 234 62 16 2 
American Holderness...... 114 538 282 57 8 1 
LIE Eo RES Sa ea A ere OF 521 280; 79 12 1 
PUOUROV RI ss. . atest murs ioldih «ott 81} 383} 321 | 181 D3 11 
MEMOTAABY: io. °c te tld aha shel 65 389 350 144 44 7 





A glance at the above shows a remarkable resemblance between 
the milk from the Holstein-Friesians and the Ayrshires upon the 
one hand, and between the Jerseys and Guernseys upon the other, 
while the American Holderness and Devons ae to occupy a 
midway position. 
The large number of small globules and relatively small num- 
‘ber of the larger globules of the Holstein-Friesians and Ayrshires, 
