


dangerously laden with the accumulation of fat stored up in their 
bodies, and it is also a matter of common remark that soon after 
the period of lactation begins with the cow, this stored up fat, 
which seems like a provision of nature to enable her to meet. 
such emergency, disappears, only to reappear again when a like 
emergency is to arise in the near future. 
WHAT 1s CRUDE Fat? 

New York AGricunTuraL EXPERIMENT STATION. 195. 92 
In the tables, as one of the constituents of the foods, crude fat — Oe 
is mentioned and its amount determined. By crude fat is meant 
in this report that portion of the food, whether hay or ensilage, 
grain or roots, which is dissolved out by ether; and it is well 
known that in all foods there are present besides the oils and fats 
several other compounds in greater or less quantities, according 
to the food under examination, which compounds resemble the 
fats and oils in being soluble in ether. The character of this 
ether extract, as the mixture of these several compounds soluble 
in ether is termed, has recently been studied by others, and is at 
present being investigated at this Station. 
Dr. August Stellwaag has by the method of saponification 
studied the composition of the ether extract of several foods, and 
finds these extracts to contain of fats and fat acids the following 
per cents : 




Neutral fats.| Fat acids. Total. 
Pe S|. =. ~ sce Magers) sos la.5 cle ei Zoeio Bivea 61.05 
RiGViGrraAn ......cmste ON aR WSN 78.31 18.77 97.08 
DIECRIOTAN . . . .0, celine we nies tales Ufoiyr cs: 15.82 94.55 
MIE «=~. celui alase ban einai (2099 16.99 8998 
Ce: SR ae aR Re IG Rey Sie Mit 61.60 29.58 91.18 
oo SL SIMMS 078 CRD al fe 88.71 6.67 95.38 
REE EMRRUTY  , . . . a Riehpiely Rene oa Uiele ts 58.57 30.50 89.07 
TES es... 3 atetatloarete ror outa. ones 57.70 24.80 82.50: 
PSEMEDLOULS . . .. lacie esl ahe Bei aa 24.60 32.65 57.25. 
ATIBGOCICAKE . . . . us sletaeicale stele bec. 89.56 8.86 98.42 | 
PeUCAKE .. . swasieinictih a's. 83.79 18339" 97.18 
Cotton-séed cake ...2.0.8 200.505. 81.14 6.30 78.44 
Potateenne.;....- eigenen o, 16.33 59.07 75.40 
Recta... Sa 23.04 35 34 58.38 



