COTTON-CAKE. 
71 
The second quantity of urine received .— 
This quantity of urine was submitted to the same system 
of chemical and microscopical analysis as the first quantity, 
but it yielded none of what may be termed the extraordinary 
reactions already detailed, in reference to the presence of 
urate of soda and excesses of mucous and hippuric acid. 
Its specific gravity was easily determined, and found to 
be 1050, which is about the average. 
By the microscope, crystals of oxalate of lime were dis¬ 
covered ; but as this substance is said to be very frequently 
found in the urine of the herbivora, its occurrence in the two 
samples of urine examined does not, as far as I can judge, 
call for any special remark. 
In short, this second quantity of urine appears to be of 
normal composition. 
In the annexed figure, a represents the microscopic appear¬ 
ance of the crystals of hippuric acid when rapidly deposited 
from solution; b, the same substance slowly crystallized 
from its solutions in water; and c, the microscopic cha¬ 
racters presented by the crystals of oxalate of lime, as they 
floated about in both quantities of the urine examined. 
ON COTTON-CAKE. 
By Professor Tuson. 
To produce the greatest weight of beef, mutton, and the 
various other kinds of animal food used by man, of the best 
quality, in the shortest time, and at the lowest cost, is a pro¬ 
blem which the farmer is continually endeavouring to solve. 
At one time the solution of this problem was effected by the 
agriculturist feeding his stock upon home-grown produce 
only, but of late years the same objects have been, at all 
