BULLETIN OF THE BUSSEY INSTITUTION. 261 
The Crops 
The Jar contained a 
No. of : 
ixture of Sand (see | Weighed 
the Jar.} ™ Grew to 
page 258) and nl SS height in Had Remarks. 
(Dried at friches Seeds. 
90° to 100°C. ) ; 
I | Plain-field Earth . . .|. 2.150 { on a } 22 
1=15 5, and 
fi dfield: 
II ape Broadfields entve mer PYOR 
. . . . , . . . 1 ee 10 flowers 
33, and 
III | Loam from Mr. Salton- } 2.790 .|. 3=17 many | | None of the plants 
stall’s Pasture flowers were ripe. 
1=17 
Iy | Bussey Peat... =. .|. 3.040 1 = 15 32 
5 enced ee 
ps: 
V |DabneyPeat. . . . .|. 1500". | { esti \| 5 | only 2 plants. 
eo ts 1600". { iad } res ib 
flowers} Only 2 plants, 
1= 15 
Vit Pipe Clay . ° . . . e ° Lost ° 1 = 14 30 
: 1= 94 
VIII |Sandalone .... .|. 0.620*. { ; + se } era 
flowers) Only 2 plants. 
Wolff found that oats and barley, and indeed “almost any kind of 
annual plant,” may be grown just as well or even better in calcined 
loam or garden earth that has been mixed with a small proportion of 
an ammonium salt or a nitrate, as they can in the original uncalcined 
earth to which no fertilizer has been added. 
Some sets of Wolff’s experiments were made in pots of impermeable 
stoneware and others in glass jars. In some of the comparative trials 
he watered the soils with rain-water, and in others with distilled water ; 
but one and the same conclusion was always reached. The plants 
grew normally and even luxuriantly both in the original garden earth 
and in the calcined earth to which nitrogeneous matters were added ; 
but in those pots of the calcined earth which were left free from any 
addition of nitrogenized matters, the plants were always miserable 
dwarfs, of unhealthy aspect. 
* Only two plants. 
+ See his “‘ Praktische Diingerlehre,” Berlin, 1872, pp. 5, 6, 15, 17; and his 
original papers, notably that in “ Chemisch-Pharmaceutisches Central-Blatt,’ 
1852, 23. 657. 
