Oil the Potato Disease. 
369 
D. 
1. 
IVllucid s*ems, pale green, 
heai!s with globose sporitlia. 
Aspergillus 
glaucus. 
All pale brown, heads Transp;irent, except the netted parts, 
like brooms. 
1, 2, 3, on starch bread (April H, 1846) from potatoes. 
No. 1, on decayed tulip leaf, May II. 
Grey; stems pellucid ; on potato, dark 
inside when cut, afterwards became 
as hard as stone, v. specimens. 
Aspergillus penicillatus. 
Stems pellucid, sporidia whity-brown, on diseased potato 
leaf in pit ; also on pith of dead geranium. 
Monilia racemosa. 
Black, on putrid potato. 
Paclinocvbe subulata. 
In the middle of diseased potato, 
dirty yellow, shiny. 
The potatoes at Bicton (Devon), under a melon-frame, were 
also described by Mr. Barnes, the gardener, as looking qidte 
healthy ; and others also, planted in borders in the open ground, 
looking very flourishing during January last, but, on the 9th, 
10th, and 11th of February, sharp frosts occurred, and the mean 
temperature of the week was 1^^ helow the average for the last 
twenty years : and what was the temperature of the week previous 
to this? — why 7' above the average for the same time. And what 
was the consequence ? It is thus described on the 21st of Fe- 
bruary: — "Another sample from tubers, supposed to have been 
sound, also manifested the symptoms in putrifying blotches on the 
leaves, accompanied by the underground grangrene.'^ * 
* Gaid. Chron., Feb. 21. 
