TRANSACTIONS OP SECTION K. 



339 



recognised. Information obtained by an inquiry during the past two years by 

 Prof. A. Henry is summarised in the following table : 



To sum up, the water catchment areas still privately owned should be com- 

 pulsorily acquired, either by the Corporation or by the State, in order to preserve 

 the purity of the water supp'ly. As soon as acquired they will form convenient 

 centres for afforesting the hill grazing zone, which lies between the agrarian zone 

 utilised by agriculture and the moorland zone on which trees can never be 

 profitably planted. Legislation is about to be enacted which will enable the State 

 or the municipalities to acquire these gathering grounds at a reasonable price. 

 The splendid success of the plantations made during the last twenty years by the 

 Liverpool Corporation on their gathering ground at Lake Vyrnwy can be rivalled 

 by other municipalities deriving their water supplies from gathering grounds 

 in the mountainous districts of Wales, Northern England, Scotland, and Ireland 



In the afternoon a Sectional Excursion to the New Forest took place. 



FRIDAY, SEPTEMBEIi 12. 



Joint Meeting with Section D — see p. 211 — at which the followhig 



Papers were read : — 



1. 'lite Development of the Bute Laboratory and Museum. 

 By h. P. W. Kenouf. 



2. On a Graded Series of Forms in Matthiola. 

 By Miss E. E. Saunders.^ 



Matthiola incanu type is densely hairy throughout. Certain glabrous form.s, 

 well known to gardeners as the wallflower-leaved strains, are absolutely devoid 

 of hairs. Besides these glabrous strains there is a rare variety intermediate 

 between them and the type. Matings between this half-hoary form and the 

 glabrous strains produce a number of intermediates, which with the parent forms 

 and the type constitute a graded series as regards hairiness, in which the familiar 

 garden forms represent the end terms. Alfthe partially hairy grades exhibit a 

 progressive development of the hairy character, the range in one grade over- 

 lapping that of the next in the series. Each grade has a distinct genetic 

 behaviour, but in one grade, and perhaps others, the appearance suggests that 

 limiting physiological conditions may be in question. Inter-relations between 

 the grades are explicable on the supposition of multiple allelomorphs. 



' To be published in Journ. of Genetics. 



