BULLETIN OF THE BUSSEY INSTITUTION. 65 
Each jar contained 180 grms. 
roasted Anthracite and 
1100 grms. Berks. sand. 
Each jar contained 180 grms. Anthracite Powder 
and 1100 grms. Berkshire sand. 
The crop harvested The crop harvested 
Feb. 3, 1875. Feb. 3, 1875. 
The jar was watered 
with — Weig’d | Grew to Had |\Weig’d | Grewto | Had 
gris. height. seeds. || grms. ‘height. j|seeds. 
No. of jar. 
Sulphate of potash .| 0.195 | 3/7 B/7 5/ 0.140 | 2/7 5// 
Phosphate of potash . | 0.180 5} 5S 0.140 | 3b 5} 
Rain-water .:... .| 0,125 3 0.180 |4. 5 
Nitrate of potash . .] 0.180 6 0.230 6 
Nitrate of lime. . .| 0.330 } 0.250 | 3 . 3} 
ove yards of potash 
and nitrate of lime. | 0.845 1.030 | 7} 
Phosphate of potash ; 
and nitrate of potash | 0.470 0.510 | li 11 
0 
1 
2 
3 
4 
5 
6 
It will be seen plainly enough, on inspecting these tables, that while 
neither the cotton cloth, the sheepskin, nor the sole leather supplied 
any nitrogenous food to the buckwheat plants, some nitrogen was 
unquestionably obtained by the plants from the roasted leathers; a 
very little, namely, from the roasted sheepskin, and a decidedly larger 
amount from the roasted sole leather. Thus while jars Nos. 0,1, and 2, 
which received no intentional supply of nitrogenous food, yielded crops 
whose weights ranged from less than 0.1 grm. to no more (with a 
single exception) than 0.2 grm.,in the case of sands alone, and of 
sands or loam with which cotton, sheepskin, or sole leather had been 
mixed, the corresponding jars that contained roasted sole leather 
yielded crops that weighed ten times these quantities, in several 
instances. With roasted sheepskin, the gain, though less decided, is 
still evident, as will be seen from the following table, excepting one 
set of experiments in which the roasted product was mixed with Berk- 
shire sand. The mean weight of the crops obtained from 28 of the 
jars, Nos. 0, 1, and 2, just now alluded to, that contained mere sand, 
or sand and loam admixed with cotton, or the air-dried leathers, was 
only 0.139 grm.; while the weights of the crops obtained in similar 
jars, by the use of the roasted leathers, were respectively as follows : — 
Roast SHEEPSKIN, Roast SoLE LEATHER, 
together with together with 
No. Berks. Prov. Berks. Prov. 
of jar. Sand, Loam, Sand. Sand, Loam, Sand. 
0 (Sulph. potash) 0.190 0.230 
1 (Phosp. potash) 0.060 0.700 0.470 0.210 1.980 1.750 
2 (Rain-water) 0.105 0.850 0.250 0.220 2.120 0.910 
VOL. II. 5 
