570 
ME. J. B. LAWES, BE. GILBEET, AJSB DE. PUGH ON 
July 28. — Ninth pipette-ful of the sulphate-of-ammonia solution added. 
July 29. — Only two of the seeds germinated; plants as follow: — 
No. 1. (a) Main stem, out of the ground single, and then gives off (b) and (c); is 
22 inches high ; lower leaves dead, and lowest shows a fungous growth ; six air-roots (two 
still growing) from first joint or point of separation ; five nodes, each giving a leaf, only 
the top one green; head bursting forth, (b) 28 inches high; five nodes, with leaves, 
upper two only growing ; stem slim below and thicker higher up ; awns of head appear- 
ing. (c) 5 inches high ; two leaves ; fresh and green. 
No. 2. More vigorous than No. 1, and livelier colour ; leaves the ground single ; half 
an inch up divides, and also gives off roots Avhich go into the soil ; three-quarters of an 
inch higher a second shoot, and more roots given off; one reaches the soil, two grooving 
dowmwards, and several withered ; lowest leaves dead and show fungous growdh, parti- 
cularly where they lie on the soil. 
August 17. — Tenth pipette-ful of the ammonia-solution added (new solution 
= 0-00359 N). Plants growing ^dgorously under the influence of the ammonia; nearly 
at the top of the shade ; several heads appearing. 
August 24. — Eleventh pipette-ful of the ammonia-solution added. 
Sejytember 7. — Twelfth pipette-ful of the ammonia-solution added. 
October 5. — Plants ripening; seven stems with heads; lower leaves of each dead or 
ripe, and two or three upper ones of each green. Some new shoots appearing at the 
base. 
October 24. — Three heads green, the others ripe. 
October 26. — Plants talcen wp : — 
Only tw^o seeds grew, and gave plants as follow : — 
No. 1. Stem divided a httle above the surface of the soil, giving plant (a), and an inch 
higher up divides again, giving {b) and (c) ; below the first point of separation the stem 
scarcely thicker than a pin, hard and solid, [a) 34 inches high ; six visible nodes ; stem 
below the lowest very thin and hard, but larger, soft and succulent higher up ; head 
3 inches long, ha\ing sixteen joints, with glumes and pales, and awns 4 to 6 inches long; 
two ripe plump seeds, and others shrivelled up. [b) 28 inches high; five nodes; below 
the lowest stem hard, firm, dry, and almost solid, and but little thicker than a pin; 
stem higher up larger, but still quite delicate; head \\ inch long, with three joints 
barren, and seven with glumes, pales, and long awns, but no seed, (c) 30 inches high ; 
five nodes ; lower part of stem not quite so thick as (a) and (b) ; head ripe ; raciiis 
2J inches long, with two joints barren, and thirteen with glumes, pales, and a-wns; also 
some shrivelled seeds. 
No. 2. Stem to inch above the soil little thicker than a pin, quite solid, and fii-m; 
then a thick and bunchy node and six stems. Stem (a) 18 inches high to rachis; four 
nodes; four leaves; crooked rachis 1|- inch long, with three joints barren, and seven 
with glumes, pales, and awns, (b) 21 inches high to head ; rachis 2^ inches long, with 
three joints barren, and thirteen with glumes, pales, and long awns; four nodes; five 
