570 MR. J. B. L\\Vi:s, DB. GILBBBT, AND DR. FU&B OR 



July 28. — Ninth pipette-fill 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. (<•■) 6 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 which go into the soil ; three-quarters of an 

 inch higher a second shoot, and more roots given off; one reaches the soil, two growing 

 downwards, and several withered ; lowest leaves dead and show fungous growth, parti- 

 cularly where they lie on the soil. 



August 17. — Tenth pipette-ful of the ammonia-solution added (new solution 

 = 0'00359N). Plants growing vigorously 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. 



September 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 2G. — Plants taken up: — 



Only two seeds grew, and gave plants as follow : — 



No. 1. Stem divided a little above the surface of the soil, giving plant («), 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, having 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 lh 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 ; rachis 

 2h inches long, with two joints barren, and thirteen with glumes, pales, and awns; also 

 some shrivelled seeds. 



No. 2. Stem to 1^ inch above the soil little thicker than a pin, quite solid, and firm ; 

 then a thick and bunchy node and six stems. Stem (a) 18 inches high to rachis; four 

 nodes; four leaves; crooked rachis lj 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 



