502 MR. J. B. LAWKS, DB. GILBERT, AND DR. PTOH OH 



No. 3. — 0«te(18O8); eight seeds i prepared soil; without mtrogewm -manure. 



(See Plate XV. fig. 6.) 



April 27. — Seeds set, and the pot placed under a shade over sulphuric acid. 



]\[ ai j 7, — The pot removed to its shade on the stand. 



May 22. — A pipctte-ful of the sulphuric-acid solution added 



May 29. — Eight plants, 4 to C inches high; four or five leaves each; lower ones 

 yellow, upper ones green and growing. These Oats growing rather hotter than either 

 No. 1 Wheat, or No. 2 Barley. A pipctte-ful of the phosphate-solution added. 



j une 7. — A pipette-ful of the phosphate-solution, and a pipctte-ful of the sulphuric- 

 acid solution added. 



June 19. — Eight plants, G to 9 inches high ; five or six leaves each, lower yellow and 

 dead, upper green. Tips of some of the leaves injured by action of direct sun-rays. 



[General note. — White paper had been tied over all the shades to screen from the 

 direct rays of the sun ; but in this case not quite high enough.] 



June 2G. — Eight plants; five 10 to 11 inches high, and in head; three 8 to 9 inches 

 hifh ; no appearance of heading, and two of them a green shoot at the base. Six or 

 seven leaves on each plant. The rachis of the seeding plants long and crooked, with 

 one or two seeds at top, without signs of seed below. All the plants apparently at 

 termination of growth ; remain only to see how far they will ripen. 



July 3. — A pipette-ful of the phosphate-solution, and a pipette-ful of the sulphuric- 

 acid solution added. 



July 13. — Plants taken vp : — 



Eight plants, quite dead ripe for some days, having had a hot sun. 



Plant (1) 13J inches high; five leaves; rachis 1^ inch long, with one seed. Plant (2) 

 11 J inches high ; five leaves; rachis 1| inch. Plant (3) 12]inches high ; five leaves ; rachis 

 Jh inch long, with two seeds. Plant (4) 12^ inches high ; with shoot appearing at base ; 

 rachis 1 g inch long, with two seeds. Plant (5) 11^ inches high; five leaves; with shoot 

 appearing at base. Plant (0) 9 inches high ; five leaves ; and shoot at the base, 4 inches 

 long. Plant (7) 10 inches high; five leaves; and shoot at the base 4 inches long. Plant 

 (8) lOi inches high ; five leaves ; rachis 1^ inch long, two seeds. Roots only extended 

 about 2 inches deep in the pot. Soil w T et and soft ; the lower part firm, but not hard. 



Preparation and analysis as described at pp. 543, 544. 



No. 4. — Beans (1858); three seeds; prepared soil; without nitrogenous manure. 



April 27. — Seeds set, and the pot placed under a shade over sulphuric acid. 



May 20. — Pot removed to its shade on the stand. Three plants up, 2£ inches high; 

 three leaves on each ; dark green and healthy. 



May 22. — A pipette-ful of the sulphuric-acid solution added. 



May 29. — Plants 3 to 4 inches high; one looks to be dying; the others have specks 

 on their leaves. A pipette-ful of the phosphate-solution added. 



June 7. — A pipette-ful of the phosphate-solution, and a pipctte-ful of the sulphuric- 

 acid solution added to the soil. 



