48 Meeting of British Association 
discuss the relation of plant growth to assimilation, and also the 
scientific aspects of electro-culture. Certain soil problems on which 
our knowledge is now rapidly advancing will, it is hoped, be dealt 
with in papers by Prof. Priestley, Dr Pearsall and Dr Salisbury, who 
will discuss the relative importance of hydrogen-ion concentration 
and basic ratios as criteria of plant habitats. A session will be 
devoted to problems of a morphological nature, and another to 
mycology. 
Section K instituted the “popular” lecture long before it became 
customary in other Sections, and this year it is hoped that Dr W. L. 
Balls will speak on the subject of “Cotton.” Botanists, as usual, will 
be well provided with excursions, and the local secretaries are 
arranging journeys to the famous sand dunes near Liverpool, and to 
Great Orme’s Head on the Welsh coast. In addition there may be a 
short expedition to the Isle of Man for biologists at the end of the 
meeting. 
An innovation this year will be the exhibit, during a soiree, of 
laboratory apparatus and specimens, to which botanists are invited 
to contribute. The usual botanical exhibits will be on view in the 
spacious rooms of the Hartley Botanical Laboratories, where the 
Section will meet. 
F. T. BROOKS, 
Recorder of Section K. 
