550 MR. J. B. LAWES, DR. GILBERT, AND DR. PUGH ON 
extended to the lower part of the pot; but the great mass remained near the base of the 
stem. Total quantity of root very small compared with that of wheat No. 6 manured 
with ammonia-salts. For general character of root-development, see Plate XV. fig. 19. 
For method of further treatment see pp. 543, 544. 
No. 2.—Barley (1857) ; six seeds; prepared soil ; without nitrogenous manure. 
(See Plate XV. fig. 2.) 
June 9.—Six plants; 2 to 3 inches high, with two fully developed leaves; tips of 
some of the leaves slightly yellow. 
June 15.—Three plants with three leaves, and three with two leaves each; tips of 
lower leaves slightly yellow, but general appearance healthy. 
June 24.—Plants 4 to 6 inches high, with three or four leaves each; much the same 
condition as wheat No. 1 at this date. 
July 4.—6 to 7 inches high, with four or five leaves; paler than wheat No. 1; 
looking sickly. Drops of water on tips of leaves and inner surface of shade: see Note 
thereon to wheat No. 1, same date. 
July 11.—Lower leaves drying np; upper ones growing a little, apparently at expense 
of the lower. Stems of these and the other barley plants reddish, and have been so 
since the formation of true stems with nodes. The barleys form stem more readily than 
the wheats, which are more leafy. 
July 22.—Not much improvement. 
July 29.—Only two small leaves at the top green; the amount green at one time 
does not increase; lower leaves dry up as new ones form. 
August 10.—Very little change, except that one stem shows slight indications of 
heading. 
August 24.—Plants taken up :— 
Six plants, 5 to 17 inches high, with six to nine leaves on each plant. Two indicate 
slight tendency to heading, the sheath being swollen; but growth obviously ceased, the 
two upper leaves having at last lost colour and dried up. On opening, one head showed 
a rachis 2 inches long. The plant was very dry, so no fresh weight taken. 
Prepared and analysed as described at pp. 543, 544. 
No. 3.—Barley (1857) ; six seeds; prepared pumice; without nitrogenous manure. 
(See Plate XV. fig. 3.) 
June 9.—Six plants, 24 to 4 inches high; more developed, but more slender than the 
barleys in soil (Nos. 2 & 8). Leaves turning yellow at the tips. 
June 15.—Six plants, 6 inches high, each with three fully developed leaves; tips of 
lower leaves dried up; middle leaves have yellow tips; upper ones pale green but 
healthy. Plants appear to have almost done growing. 
June 24,—Height about the same; three or four leaves each plant; lowest dried up, 
next drying, and upper ones green. 
