Botany at the British Association. 355 
and spoke of f The Inadequacy of the Theory of Natural 
Selection as an Explanation of the Facts of Geographical 
Distribution and of Evolution.’ This was supported in ‘ A 
Mathematical Conception of Evolution based on the Theory 
of Age, Size and Space,’ by Mr.- G. Udny Yule, F.R.S. The 
addresses of Mr. C. Tate Regan, F.R.S. , Prof. W. Johannsen 
(Copenhagen), and Mr. J. T. Cunningham, the last of whom 
spoke on ‘ The Origin of Species and Origin of Adaptations,’ 
as well as the speeches of Dr. Harold Wager, F.R.S., Dr. 
Chalmers Mitchell and others in the general discussion which 
followed seemed to leave the * Age, Size and Space ’ theory 
somewhat cold. 
The afternoon session of Monday again brought up Prof. 
J. H. Priestley to the platform of Section K Room, on this 
occasion taking as subject ‘ The Endodermis : a Study in 
Causal Anatomy,’ in which Prof. Priestley further expounded 
his well-known work on the origin, structure and significance 
of the endodermis. This was followed by Dr. Wilfrid 
Robinson and Mr. H. Walkden on ‘ Critical Observations on 
“Crown Gall ” in Chrysanthemum frutescens,’ in which it 
was shown that the similarities that have been supposed to 
nxist between * crown ’ gall and malignant tumours are more 
apparent than real. The session included a fine address by Prof. 
R. Ruggles Gates on ‘ Size Inheritance in Plants and Animals,’ 
and was immediately followed by a ‘ Popular Lecture on 
Moulds,’ by Professor Dame Helen Gwynne- Vaughan, D.B.E., 
which proved to be full of interest, especially when dealing with 
Dame Helen’s own able research work on Moulds. The lecture 
was a model of demonstration and delivery, and was finely 
illustrated by a large number of lantern slides. 
The session of Tuesday morning gave an opportunity 
to one of the Vice-Presidents of Section K, the Rt. Hon. 
Lord Lovat, K.T., to deliver himself of a very able, interesting 
and searching examination of ‘ The Position of British 
Forestry To-day.’ Lord Lovat spoke of ‘ the lack of a forestry 
conscience ’ in Great Britain and the reason why ; of State 
Forestry, its advantages and disadvantages ; of the difficulties 
which beset the path of progress ; and of the necessity of the 
nation getting a better grasp of forestry values based on exact 
knowledge without which there could be no ordered progress. 
Dr. A. W. Borthwick supported, with a contribution on ‘ Farm 
Forestry,’ and Prof. A. Henry with a paper on ‘ The Cultiva- 
tion of Poplars,’ while others took part in the general discussion 
afterwards. Tuesday afternoon saw a goodly contingent of 
botanists at the excursion to Skipwith Common via Selby. 
On Wednesday morning (13th September) the final 
sectional session was held and, somewhat remarkable to relate, 
there was a large attendance of members, as well as a full 
1922 Nov. 1 
