EXTRACTS FROM PROCEEDINGS. 



cxlvii 



SCIENTIFIC COMMITTEE. 



George F. Wilson, Esq., in the Chair. 



The Minutes of the last Meeting were read and approved. 



Dr. Gilbert stated that the specimens of Conferva dendritica, 

 Agardh, submitted to him at the last Meeting had been examined, 

 that a little iron had been found, but that the specimens were too 

 small and insufficient to give any reliable result. 



Specimens of Yinca were forwarded by Mr. Wilson Saunders, 

 infested with Puccinia vincce, and unaffected shoots to show the 

 effect of the parasite. 



A branch of Hawthorn was also sent by him with pink flowers. 

 It was a seedling from a White Hawthorn, which in the first year 

 of flowering produced white flowers, in the second flowers tinged 

 with pink ; and in the third year they were of a decided pink. 

 The only way in which he could account for the circumstance, 

 was the existence of a pink-blossomed thorn about sixty yards off, 

 by which it might have been impregnated. 



Specimens of a Curculio which infests Vines were submitted 

 to Mr. Stainton, who promised to report on them at the next 

 Meeting. 



Mr. Burr sent cuttings of a Douglas Pine injured by frost. Of 

 three trees planted in a triangle, only one was affected. It seemed 

 clear that the injury dated from a time anterior to the last winter, 

 and was probably of at least two years' standing. 



Leaves of an Almond tree blistered and infested with Asconvyces 

 deformans^ ere brought by Mr. Berkeley, also shoots of Apples dying 

 from the attacks of an Oidium, and leaves of Pears covered with 

 little warts, which he thought might arise from a minute Acarus. 

 There was a little aperture at the top of many of the warts, but 

 not of all. The true cause of the affection was considered 

 doubtful. 



The Beport of the Meeting of the Committee at Chiswick, 

 May 21, was read, and the Members were invited by Dr. Gilbert 

 to Bothh amp stead on the 8th to inspect the Grasses under ex- 

 periment. 



Green-centred Boses were submitted to the Meeting, the sup- 

 posed cause of which was variously stated, without, however, pro- 

 ducing conviction. 



