THE SOHECES OF THE NITEO&EN OF VEGETATION, ETC. 
561 
May 22. — A pipette-fal of the sulphuric-acid solution added. 
May 29. — Five plants 4 to 5 inches high, with three or four leaves each ; lower ones 
yellow and dried up ; upper pale yellowish green. A sixth plant, smaller. A pipette-ful 
of the phosphate-solution added. 
June 7. — A pipette-ful of the phosphate-solution, and a pipette-ful of the sulphuric- 
acid solution added. 
June 19. — One plant dead; two about 4 inches high with shoots at the base; other 
two about 8 inches high. 
June 26. — Plant [a) dead ; cause not obvious. Plant {h) 10 inches high ; as last year, 
forming stem well. Plant (c) 8 inches high. Plant (d) a main stem which is dead, 
and a new shoot which is green (each 3 to 4 inches high). Plant (e) a good deal like (d). 
July 3. — A pipette-ful of the phosphate-solution, and a pipette-ful of the sulphuric- 
acid solution added. 
July 14. — Plant [h] 9 to 10 inches high; six dried up, and two green leaves; swelling 
apparently for heading. Plant {c) about 7 inches high ; seven dried up and two green 
leaves. Plant {d) two stems 4 to 6 inches high ; six dried up and two green leaves. 
Plant [e) two stems 4 to 6 inches high, with five dead and two green leaves. 
The upper leaves quite short (1-1-| inch long), and apparently live at the expense 
of the lower. 
July 2 '^. — Plant [a) dead; six leaves, becoming brown-yellow; a black mildew has 
attacked the leaves and stem ; and a white gossamer-like fungus has attached itself in 
places to the stem and leaves. Leaves 3 ^ to 4 inches long ; the upper thread-like and 
drooping. Plant (h) the most flomishing ; 14 inches high ; but very spindly ; six nodes, 
which, with portions of the adjoining culm, especially the upper part, are dark purplish ; 
eight leaves ; lower ones yellow, and the lowest two, which are in contact with plant 
(«), affected with the mildew ; all but the uppermost leaf 2 to 2^ inches long ; the upper 
one 1 i inch long, pale green, and quite erect, apparently the last effort of the plant, no 
new leaves forming. Plant (c), dirided just beneath the soil into three shoots; two 
apparently suckers from the other, each 3 inches high, and dead. The main plant 
6 inches high ; has seven leaves ; the four lower dead, and the three upper, making up 
half the plant, pale green ; the uppermost only ^ an inch long, in the fold of the second. 
Only one node risible ; the culm, where seen, is purplish. The white fungus occurs, but 
no mildew. Plant [d] much like the main plant (c); evidence of early effort to put out 
shoots at the base. Twelve leaves ; ten lower ones dead ; two upper ones living ; all 
2 to 2^ inches long. Plant [e] the second in size. Eleven inches high; ten leaves; 
eight lower ones dead, two upper ones living ; all erect but the lowest two ; each 2 to 
3 inches long. 
August 18 . — Plants taken up : — 
Evidently done growing ; four stems swelled for head ; all leaves except the uppermost 
dried up. Roots not much distributed ; general characters much like those of barley 
without nitrogenous manure last year (1857). Soil moist, loose, and open. 
Preparation and analysis as described at pp. 543, 544. 
4 G 2 
