EOTAL HORTICTJLTTJEAL SOCIETY. 
SCIENTIFIC COMMITTEE. 
A. G-ROTE, Esq., E.E.S., in the Chair. 
The Secretary brought further specimens of Peach-leaves and 
young shoots with a manna-like exudation. The microscopic 
structure, however, was very different from that of the manna of 
commerce, resembling rather some form of stearine. Dr. Gilbert 
undertook to examine the substance and report at the next 
Meeting. 
Specimens oi Lyclmis affected with Ustilago aniherarum were 
brought. There was no indication of any development of the 
pistil in consequence of the presence of the parasite. 
Specimens of Tragopogon affected with Ustilago recejptaculorum 
came from Mr. Wilson Saunders. 
A Cucumber-stem witb a curious gouty swelling, above and 
below which adventitious roots were developed, was exhibited, 
showing a complete derangement of the vascular wedges, while 
the medullary rays, which were greatly increased in size, were 
white instead of green. 
Leaves of vines attacked by the new Vine-pest were brought 
containing many cocci with their eggs. The Secretary undertook 
to examine them with a view to ascertain whether there was any 
difference between the eggs on the leaves and those on the roots. 
Mr. Berkeley remarked that at Chiswick, while the lower blos- 
soms of fruit-trees were killed by frost, the upper escaped. 
Dr. Hogg brought a Polyanthus in which the terminal flowers 
exhibited only the rudiments of calyx, corolla, and stamens. 
Dr. Masters presented a Eeport of the experiments at Chis- 
wick on the effects of different manures, which will be published 
in the Journal, and read two letters from I. Anderson-Henry, 
Esq., which also appear in the Journal. 
; Mr. Beeves brought perforated Peach-leaves similar to those 
whicb have been before the Committee on several occasions. 
Mr. Grlaisher brought leaves of the Horse-Chestnut which were 
dried and shrivelled by a cold wind of the force of from 20 lb. to 
30 lb. on the square foot, and laid on the table the result of his exa- 
mination of the records of rainfall at Chiswick, which, together with 
the observations of temperature, will appear in the Journal. 
Mr. A Murray brought further specimens of the eggs of JErio- 
gcister lanestris and Larch-twigs gnawed by CoJeophora laricella. 
The Meeting then adjourned. 
