CHEMISTRY IN AGRICULTURE AND PHYSIOLOGY. 485 
week), 45 to 50 per cent, of the cellulose of the poplar wood 
was digested, the animals having gained 2J lbs. in 13 days. 
(4.) With hay 10J lbs., pine-wood sawdust 7lbs., bran 10 j lbs. 
(per week), 30 to 40 per cent, of the cellulose of the pine 
wood was digested, the animals having gained 10 lbs. in 24 
days. (5.) With hay 9g lbs. paper-maker’s pulp 7 lbs., bran 
14 lbs. (per week), 80 per cent, of the cellulose of the paper 
pulp was digested, the animals having gained 7 lbs. in as 
many days. 
These experiments are to be continued, and more particu¬ 
larly with a view of ascertaining whether any nourishing 
effect is to be attributed to the cellulose.* 
Dr. Lankester, in a lecture delivered by him at the South 
Kensington Museum, speaking of cellulose, says :—We find 
in plants, whether they are composed of vascular tissues or 
of cells, that the greater part is composed of a hard substance 
called cellulose, or wood when it is formed into trunks and 
branch.es of trees. Now when we deal with the vegetable 
kingdom in our manufactures, we deal with this cellulose. 
W hen we deal with trees and cut them into boards, or when 
we take these delicate fibres and convert them into pocket- 
handkerchiefs and things of that sort, we deal with cellulose ; 
and when we have worn all our cotton and our linen to ra^s. 
they are collected for the purposes of the paper-maker. The 
whole country is at this moment convulsed to know what we 
are to do for rags now we are going to take the duty off paper. 
There is an immense quantity of this cellulose in different 
parts of the world, in the forests of Asia, Africa, and America, 
and plenty in our own wildernesses, and it is only a question 
as to whether a man shall wear it first upon his back, or have 
it manufactured into paper at once. I believe the reduction 
of the paper duty will give the greatest incentive to the young 
chemists to pursue, the subject and to make such discoveries 
and improvements in the art of paper-making, that the paper 
manufacturer will be enabled to snap his fingers at rags.” 
CHEMISTRY IN ITS APPLICATION TO AGRICULTURE AND 
PHYSIOLOGY. 
By A. S. Copeman, Y.S., Utica, N.Y. 
C Continued from page 420.) 
The various organs, duly performing their proper functions, 
are wasted and reproduced with proportionate rapidity; and 
we might almost observe the animal’s body is being com¬ 
pletely renewed, at certain intervals, by the new materials, 
* StcEckhardt’s * Chemischer Ackersman/ 1S60, No. I, p. 51. 
