X 
Journal of Agricultural Research 
Vol. V 
An Automatic Transpiration Scale op Largs Capacity for Use with 
Freely Exposed Plants 
Plate IX. Fig. i.—Four automatic balances in operation at Akron, Colo., 
June 19, 1912, with the front of the box containing the mechanism open. 
The recording device is shown just beyond the first box. Fig. 2.—Auto¬ 
matic balances, Akron, Colo., July 24, 1912; boxes closed and recorders 
covered. 
Plate X. Fig. 1.—Front of balance, cover removed, showing mechanism. 
Fig. 2.—General view of automatic balance with case removed. 
Plate XI. Fig. 1.—Measuring tray used in counting total number of balls 
delivered to the container on the balance arm during the 24-hour period. 
Fig. 2.—Another view of the measuring tray looking vertically downward 
on the tray, showing the 6o° angle which the base makes with the graduated 
side.;. 
Alternaria panax, the Cause op a Root-Rot op Ginseng 
Plate XII. Lesions on ginseng roots due to Alternaria panax. .. 
Plate XIII. Fig. 1.—Longitudinal section of ginseng root showing the results 
of inoculation with Alternaria panax. Fig. 2.—Inoculations on ginseng 
leaves with the species of Alternaria isolated from ginseng roots.. 182 
Some Potato Tuber-Rots Caused by Species op Fusarium 
Plate A (Colored). Fusarium spp. on vegetable media: Fig. 1-3 and 5.— 
Fusarium oxysporum Schlecht. 3045. 1, Twenty-one-day-old culture on 
potato cylinder showing typical bluish green sclerotial masses, no pion- 
notes. 2, Eighteen-day-old culture on stem of Melilotus alba with pion- 
notes. 3, Eighteen-day-old rice culture with typical coloration of the sec¬ 
tion Elegans. 5, Thirty-day-old cotton-stem culture with sporodochia. 
Fig. 4.— F. hyperoxysporum Wollenw. 3343. Thirty-one-day-old culture 
on potato cylinder with development of pionnotes. Fig. 6-8.— F. radidcola 
Wollenw. 6, Potato cylinder 34 days old with pionnotes brown to ver¬ 
digris. 7, Seventeen-day-old culture on stem of Melilotus alba with pion¬ 
notes and immature sporodochia. 8, Rice 28 days old, with pionnotes on 
upper surface.. 210 
Plate B (Colored). Fusarium spp. on vegetable media: Fig. 1-3.— Fusarium 
discolor Appel and Wollenw. 153, showing typical color reactions of this 
type species of the section Discolor. 1, Potato cylinder 11 days old, showing 
carmine-red pigmentation of the plectenchymatic mycelium. 2, Culture 
on cotton stem 35 days old, showing sporodochia and pionnotes drying out. 
3, Rice culture 11 days old. Fig. 4-6.— F. discolor , var. sulphureum 
(Schlecht.) Appel and Wollenw., 154. 4, Ocherous-orange pionnotes on 
11-day-old potato cylinder. 5, Sporodochia on 39-day-old cotton-stem 
culture. 6, Rice culture n days old. 210 
Plate XIV. Fig. 1.— Fusarium oxysporum Schlecht. Fig. 2.— F. radicicola 
Wollenw. Fig. 3.— F. solani (Mart.) Sacc. Fig. 4.— F. eumartii , n. sp. 
Normal conidia. Fig. 5.— F. coeruleum (Lib.) Sacc. Fig. 6.— F. discolor , 
var. sulphureum (Schlecht.) App. and Wollenw. 210 
Plate XV. Fig. 1, 2.—Potato tuber showing a soft-rot caused by Fusarium 
hyperoxysporum Wollenw. Fig. 3.—Potato tuber showing the type of rot 
produced by F. oxysporum in the experiments. Fig. 4, 5.—Potato tuber 
showing a dry-rot caused by F. radicicola . 210 
Plate XVI. Two “jelly-end” tubers from Moorland, Cal., showing external 
views and longitudinal sections... 210 
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