554 MR. J. B. LAWES, DR. GILBERT, AND DR. PUGH ON 
ones yellow; the newer and upper leaves green, healthy, and vigorous; marked im- 
provement since adding the ammonia-solution on June 10, the effect of which was 
manifest within two days after the addition. 
June 24.—Plants 5 to 7 inches high, with four leaves each ; lower leaves dried up, 
but upper ones green and vigorous; obviously improving; forming stem with nodes. 
July 4.—Plants 7 to 8 inches high, with five to seven leaves each; the newer ones 
broad, well developed, and of a deep green colour; upon the whole vigorous. Second 
pipette-ful of the ammonia-solution added. . 
[Drops of water accumulate as described in reference to No. 1 of this date. ] 
July 11.—Plants 8 to 9 inches high, with six or seven leaves each; lower ones pale 
yellow, upper ones green and vigorous. One of the stems sending out a shoot at its base. 
Third pipette-ful of ammonia-solution added. 
July 22.—Growing very well; tillering very much. Fourth pipette-ful of the ammonia- 
solution added. 
July 29.—Plants 12 to 16 inches high; one with six shoots 4 to 8 inches long; one 
with one shoot 3 inches long; and the other with two shoots just forming; shoots, and 
upper leaves, green. The ammonia seems to induce multiplication of shoots instead 
of upward growth; no nodes clear of the sheath. Fifth pipette-ful of the ammonia- 
solution added. 
August 10.—Green and flourishing. 
August 24.—Very similar to Wheat No. 6 at this date. 
September 20.—Plants taken up :— 
The lower leaves begin to lose colour considerably, no increase of growth apparent for 
some days, nor any tendency to form seed; hence, the season being far advanced, the 
plants taken up. 
Great development of root; the plate under the pot covered with a dense network 
ramified from a few fibres extended to the bottom of the pot; a similar network at the 
bottom and partially up the sides within the pot; comparatively little in the centre of 
the soil. 
Preparation and analysis as described at pp. 543, 544. 
No. 8.—Barley (1857); four seeds ; prepared soil; with nitrogenous manure. 
(See Plate XV. fig. 8.) 
June 9.—Three plants up; two 14 inch and one 33 inches high; colour pale. 
June 10.—A pipette-ful of ammonia-solution (=-00578 gramme N.) added to the soil. 
June 15.—Three plants; about 44 inches high ; each with two leaves and another 
forming. Improved by the ammonia added June 10, but not so much as the Wheat 
Nox 6. 
June 19-20.—During thenight the shade was cracked, from the bottom in the quick- 
silver, 9 inches upwards. ‘The pot with its contents was removed and put under a shade 
over sulphuric acid. After four days it was returned to its place, and covered with the 
