xxiv Proceedings. [April ^th, ign. 



Ordinary Meeting, April 4th, 191 1. 



Mr. Francis Jones, M.Sc, F.R.S.E., President, 

 in the Chair. 



The thanks of the members were voted to the donors of the 

 books upon the tables. 



Professor F. E. Weiss, D.Sc, F.L.S., exhibited a hybrid of 

 the Oxlip {Primula elatior) and the Primrose {Primula acaulis) 

 collected by him in Cambridgeshire last year, where such plants 

 are very common in the woods in which both the parental 

 species occur. The hybrid bears its flowers in clusters on an 

 erect scape as in the oxlip, but the flowers are much larger and 

 paler, and resemble in their size and marking those of the 

 primrose. The offspring of the hybrid (fa generation) showed a 

 number of different forms, some resembling the parent hybrid 

 but with a considerable range of variation in the size and colour 

 of the flowers. Most of the plants bore all their flowers on 

 scapes, but others only showed radical flowers and seemed 

 therefore to have reverted to the primrose type. The scape 

 must therefore be regarded as a dominant character, as it appears 

 in the presumptive fi generation and also in the majority of 

 plants of the iz generation. All the individuals of this genera- 

 tion have not flowered yet, but among the early flowering 

 individuals were some possessing both radical and cauline 

 flowers, and one of the primrose type with pure white petals. 



Professor W. W. Haldane Gee read a paper, written 

 in conjunction with Mr. A. Adamson, A.R.C.S., entitled 

 " Dioptriemeters." 



The paper is printed in full in the Memoirs. 



Professor E. Knecht, Ph.D., read a note "On the 

 Action of Hydrogen Peroxide on Quinone." It was shown 

 that when hydrogen peroxide is allowed to act on quinone in 

 presence of ammonia, the solution becomes heated and a 



