572 MR. J. & i.awes, mt on.iiKirr, .and i>h. WUSB OH 



July 14. — Seventh pipette-ful of the sulphate-of-ammonia solution added. Plants as 

 follow : — 



No. 1. Two stems ; one ripe, with two or three seeds ; six leaves, lowest dead rij>e, and 

 five green. The other stem 12 to 14 inches high; green; forming head. 



No. 2. Three stems, from 12 to 15 inches high. One stem swelled at the top with B 

 head, but not maturing; checked early, apparently from want of available nitrogen, 

 after which the ammonia added developed the two shoots, whose stems are green, with 

 one dead and four green leaves, and heads forming. 



No. 3. Two stems; one 8 to 10 inches high, dead or ripe; the other 14 to 15 inches 

 high, green and healthy. 



July 30. — The plants taken Wp\ — 



The experiment stopped rather prematurely, the shade getting slightly cracked. The 

 plants had manifested three orders of growth, as follow: — 



(1) The first growth, which was forming head when a fresh supply of ammonia gave 

 rise to shoots at the base. (2) The above shoots gave three headed stems : one with three 

 full and two imperfect seeds ; one with two full and one imperfect seed ; and one with 

 one full and two imperfect seeds. (3) New shoots from the base on the further addition 

 of ammonia ; green and healthy at the close, but promising to go to seed. 



The roots were very little more distributed than those of the Oats without nitrogenous 

 manure in No. 3 shade, and only extended about half the depth of the pot. The soil 

 was wet and soft. 



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



No. 12. — Beans (1858); three seeds; prepared soil; with nitrogenous manure. 



April 27. — Seeds set, and the pot placed over sulphuric acid, and covered with a glass 

 shade. 



May 20. — Pot removed to its shade on the stand. Three plants up ; 1\ inches high; 

 three leaves on each, colour dark green ; healthy. 



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



May 29. — Three plants ; one dead, one much specked, the third improving. A pipette- 

 ful of the phosphate-solution added. 



June 7. — A pipette-ful of the sulphate-of-ammonia solution added ; also a pipette- 

 ful of the phosphate-solution. 



June 19. — All apparently dying; leaves much specked with black. 



June 21. — Plants all obviously past recovery; removed but not analysed. 



No. 13. — Peas (1858); three seeds; prepared soil; with nitrogenous manure. 



April 27. — Seeds set, and the pot placed over sulphuric acid, and covered with a glass 

 shade. 



May 20. — Pot removed to its shade on the stand. Three plants up, growing exceed- 

 ingly well ; 3, 2^, and 1 inch high ; three, two, and two leaves, respectively. 



