258 BULLETIN OF THE BUSSEY INSTITUTION. 
—the jars stood side by side, and they were all watered with rain-water 
throughout the experiment. The glass preserve jars of this set of 
experiments were charged as follows : — 
The Crops, harvested Feb. 20, 1874, 
No. of | Gontents of the Jar. Weighed Gan to 
the Jar. : 
in grms. : : Had 
(Dried at pe Seeds. Remarks. 
90° to 100°c. ) 5 
I +; 500 grms. Loam* from 1=13 
Bussey Plain-field and 1.230 . aie 13 
700 grms. Berkshire Teel 'g 
Sand. ei oe 
II | 500 grms. Loam* from 1 = 10} 
Broadfields Farm and 0.765 1=10 8 
700 grms. Berkshire 4 ee 
Sand . Rae Soe 
III | 500 grms. Loam* from 1—19 1 aha The plants were 
Mr. H. Saltonstall’sold | | 9 ye ‘ae RAlILES still green and 
Pasture and 700 grms. ; 1=10 Dil nee immature when 
Berkshire Sand . harvested. 
IV | 250 grms. Peat from Bus- 
sey Farm, & 375 grms. 
Berkshire Sand . 
V_ | 300 grms. Peat from Dab- 
ney Estate and 450 
grms. Berkshire Sand 
VI |80 grms. Kaolin and 
1200 grms. Berkshire 
Sands... By Peace? 850s 
VII | 45 ¢rms. Pipe Clay and 
1.790 . er ra 10 
0.975t . = ie } 12 Only 2 plants. 
0.1007 . | { Ag nai 3} | Only 2 plants. 
1300 grms. Berkshire 0.0600 . | «l= 7. 1 Only 1 plant. 
Sand. ae 
A 1= 3} 
VIII | Berkshire Sand alone .|. 0,100f . { Spain 0 Only 2 plants. 
Lest the absolute smallness of the figures in the above table should 
mislead the reader, it may be remarked that the amount of crop har- 
vested from jar No. 3 was at the rate of some 7,000 lbs. of dry buck- 
wheat straw to the acre of land. This estimate is based upon the fact 
that the quart of mixed soil in the.jar weighed 24-4 lbs., whence the 
weight of an acre of it taken to the depth of one foot (= 43,560 C. F.) 
would be about 3,250,000 lbs. The amount of straw harvested from 
jar No. 8 on the other hand was at the rate of 285 lbs. to the acre. 
* In the loam from Bussey Plain-field, dried at 100° C., analysis indicated 
0.24% of nitrogen; in that from Broadfields Farm, 0.27%, and in that from Mr. 
Saltonstall’s Pasture, 0.20%. 
t Only two plants. t Only one plant. 
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