38 aOW CROPS FEED. 



Table. The weights are expressed iu the gram and its 

 fractions. 



Kind of Plant. 



Duration 



of 



Erpenrmnt. 



m 



.so 



II If t« 



HI 



Dwarf bean. 



Oat 



Bean 



Oat . . . 

 Lupin. 



i months 



2 



3 



3 " 



2 



7 weeks 

 6 " 



. 2 months 



•■ ^'/* ': 



. 31/2 " 



•• as manure 



Lupin 5 mouths 



" 'as manure 



Dwarf bean. 

 Cress 



0.780 

 0.377 

 0.5.30 

 0.618 

 0.139 



2!a02 

 0.600 

 0.:343 

 0.686 

 0.792 

 0.665 

 0.008 

 0.026 

 0.627 

 2.512 f 



111.T20 130.11 



1.87 

 0.54 

 0.89 

 1.13 

 0.44 

 1.82 

 6.73 

 1.95 

 1.05 

 1.53 

 2.35 

 2.80 

 0.65 



0.0.349 0. 



0078 0. 

 0.0210 0. 

 0.0245 0. 

 0.0031 0. 

 0.048010. 

 0.1282 0. 

 0.03490. 

 0.02000. 

 0.0399;0. 

 0.0354 0. 

 0.0298|0. 

 0.00130.0013 



0340-0.000!) 

 0067 -0.0011 

 0189—0.0021 

 02261-0.0019 

 00:M —0.0001 



+0.0003 

 —0.0036 

 —0.0010 

 +0.0004 

 —0.0002 

 +0.0006 

 -0.0021 



0.0000 

 —0.0130 



While it must be admitted that the unavoidable errors of 

 experiment are relatively large in Avorkhig Avitb such small 

 quantities of material as Boussingault here employed, Ave 

 cannot deny that the aggregate result of these trials is de- 

 cisive against the assimilation of free niti'ogen, since there 

 was a loss of nitrogen in the 14 experiments, amounting 

 to 4 per cent of the total contained in the seeds ; Avhile a 

 gain was indicated in but 3 trials, and was but 0.13 per 

 cent of the nitrogen concerned in them. — (Boussingault's 

 Agro/wmie, Chimie Ar/ricole, et Physlologie, Tome I, 

 pp. 1-64.) 



The Opposite Conclusions of Ville.— In the years 1849, 

 '50, 'ol, and '52, Georges Ville, at Grenelle, near Paris, 

 experimented u})on the question of the assimilability of free 

 nitrogen. His method w\is similar to that first employed 

 by Boussingault. The plants subjected to his trials were 

 cress, lupins, colza, wheat, rye, maize, sun-flowers, and to- 

 bacco. They were situated in a large octagonal cage 

 made of iron sashes, set with glass-plates. The air was 



