W Thomson on the Food of Animals. 
considerable. By comparing this experiment with a previous 
one, it was found that, while 100 lbs. of dry grass produce about 
11| lbs. of dry milk, 100 lbs. of dry grass and entire barley mixed, 
produce Sg lbs. of dry milk. 
Grass alone produces a larger quantity of dung than mixed 
barley and grass fodder ; 100 lbs. of grass leaving 33J lbs. of dung, 
while barley and grass produce only 30 lbs. of dung; but 100 lbs. 
of the grass consumed, that is, the grass taken into the circulation 
of the animal, and not rejected in the form of dung, produces 17^ 
lbs. of dry milk, while 100 lbs. of the mixed barley and grass diet 
form only 12 lbs. of dry milk. . . . Another important deduction 
is, that the total quantity of matter taken into the circulation daily 
is less when grass is alone used, than when a mixed diet is em- 
ployed ; the daily consumption being of dry grass, by both cows, 
33J lbs., and of the mixed diet 42 lbs., being a difference of 9 lbs., 
or 4A lbs. by each cow. — p. 88. 
The ultimate composition of the barley was found to be as 
follows: — 
I. II. III. IV. 
Carbon, 46'11 41-64 
Hydrogen,... 6-65 6*02 
Nitrogen,... 1-91 1*81 201 1-98 1-95 
Oxvgen,.... 42-24 38-28 
Ash, 3-09 2-79 
Water, 946 
100- 100- 
Experiments were then made with entire malt soaked in boil- 
ing water, along with grass; and, according to these trials, the 
barley and malt (entire) experiments may be compared as fol- 
lows: — 
I. Milk; 
100 lbs. of hay and barley produce. . . . 8-41 lbs of dry milk. 
100 lbs. of hay and malt produce 7*08 ditto. 
II. Butter ; 
100 lbs. hay and barley produce 1-82 lbs. butter. 
100 lbs. hay and malt produce 2-07 ditto. 
III. Weight of Cattle; 
Loss. 
lbs. lbs. 
Weight of cattle before barley experiment 2030 Q 
Weight of cattle after do 1989 41 
Weight of cattle before malt do 2044 
Weight of cattle after do 2022 22 
The next experiments related to crushed barley and malt 
