British Association Meeting 159 
intelligible except to different groups of people engaged in highly 
specialised departments of research. The occasion of the annual 
meetings of Section K forms an opportunity for every botanist to 
learn what is being done in branches of the subject other than his 
own, but he cannot do this with any completeness unless the author 
will put himself in the place of his audience. This result can be achieved 
in the great majority of cases without any sacrifice of substance. 
The plan followed in arranging the papers has been to allot half- 
an-hour (in a few cases somewhat longer) to each author, including 
time for discussion. The author can decide for himself how much of 
his time he will devote to expounding his results and how much he 
will leave over for comment or criticism by others. But at the end 
of the allotted time it will be necessary to call on the author next on 
the programme. The necessity of interrupting what may be a profit¬ 
able discussion is regrettable, but with a very full programme it is 
impossible to allow any considerable latitude without unfairness. 
The President’s address, which will be delivered at the outset of 
the sectional meetings, at 10 o’clock on Thursday morning, will be 
devoted to a consideration of the changes in our outlook on botany 
during the last few decades, the causes of these and their implications 
for the subject as a whole. The rest of the morning will be occupied 
by miscellaneous papers by Miss E. R. Saunders, Prof. H. H. Dixon 
and Mr N. G. Ball, Prof. Neilson Jones, and Dr M. C. Rayner. The 
afternoon will be devoted to three papers by Dr F. G. Gregory, 
Mr C. Hunter, and Mr F. G. Henderson, on the effects of light, tem¬ 
perature and C 0 2 concentration on various functions of the plant. 
Mr S. G. Jones will speak on the life-history of Rhytisma. 
Friday morning will be occupied by an address on Oxygen and 
Respiration by Dr F. F. Blackman. This will be followed by papers 
on the effect of electricity on plants, in which Prof. V. H. Blackman 
and members of his school will take the leading part, and by miscel¬ 
laneous papers. The afternoon will be principally devoted to papers 
on recent work on chromosomes by Major C. C. Hurst, Miss Ferguson, 
Miss Campin and Miss Rees. 
Saturday will be occupied by a field excursion, the place being not 
yet definitely settled. 
Monday morning will be devoted to morphology. Dr D. H. Scott 
will open with an account of the Early History of the Stele, Prof. 
Lang will follow on the Organisation of the Plant in the Vascular 
Cryptogams, and Prof. McLean Thompson will deal with Develop¬ 
mental Morphology. Dr E. N. Thomas will describe observations on 
