THE SOURCES OF THE NITROGEN OF VEGETATION, ETC. 557 
Roots by no means so abundant as those of Wheat with ammonia-salt; only a few 
fibres extended through the hole at the bottom, or to the sides of the pot. 
Preparation and analysis as described at pp. 543, 544. 
No. 10.—Beans (1857); two seeds; prepared soil; intended to have nitrogenous manure. 
June 9.—Only one plant up; 2 inches high; turning black and obviously dying. 
For particulars of taking up, setting fresh seeds and recommencement of the experi- 
ment, see remarks made on June 9 to Bean No. 5, p. 552. 
June 15.—Not yet up. 
June 24.—Two plants just appearing. 
July 4.—Two plants well up and growing; leaves just opening. 
July 11.—Two plants; 6 to 8 inches high; leaves deep green. 
July 22.—Green, healthy, and vigorous. 
July 29.—Nearly as at last date, but somewhat declining. 
August 10.—Obviously dying. 
August 24.—Dead. 
The season too far advanced to repeat this experiment. 
No. 11.—Beans (1857); two seeds; prepared pumice; intended to have nitrogenous manure. 
June 9.—One up; slender; black spots on the leaves; obviously unhealthy. Taken 
up, and the experiment recommenced; for particulars of resetting, &c., see remarks to 
Bean No. 5 of this date, p. 552. 
June 15.—Not yet up. 
June 24.—Two plants just up. 
July 11.—Apparently not going to grow. 
July 22.—Dead; the season too far advanced to repeat this experiment. 
No. 12.— Wheat, Barley, and Beans (1857); Wheat and Barley three seeds each, Beans 
two seeds; in rich Garden soil. (See Plate XV. fig. 13.) 
May 18.—Seeds of wheat, barley, and beans, all sown together in a single pot of 
good garden soil, and placed under a shade (No. 12), to be supplied with washed 
air, &c., just as in the other experiments. The seeds germinated well. 
May 28-29.—During the night, owing to a leakage of water from the reservoir into 
‘the vessel A (see description at p. 476 et seqg., and Plate XIII.), it passed over into the 
sulphuric acid and carbonate of soda wash-bottles, and the mixed liquid passed into the 
shade to the depth of some inches, and destroyed the experiment. 
May 30.—Plants from seeds which had been set at the same date as the foregoing, 
were transplanted into a fresh pot of garden soil, which was placed under the shade, 
and the experiment recommenced. The wheat and barley plants were about 5 inches, 
and the beans about 4 inches high. 
June 15.—Healthy, and growing vigorously. 
June 24.—Three wheats, three barleys, and two beans. Wheat 14 inches, barley 
