322 [Proc. B^i.r.C.. 



lysed into a number of separate factors, each of which might 

 be seen more or less clearly reflected in the structure of the 

 plant organ affected by it. The general effect of alteration 

 in structure directly produced by extreme alteration of en- 

 vironment was next illustrated by means of lantern slides of 

 lowland plants which had been removed from their natural 

 habitats and planted high up in the Alps, the changes 

 thereby produced being very marked. He next proceeded to 

 show the connection between some of the more important 

 individual factors in plants' environment and the structure 

 of the plant involved. Thus the effects of the presence or 

 absence of water, light, warmth, wind, and the chemical 

 nature of the soil were discussed and fully illustrated with 

 photographs and diagrams on the screen. A number of slides 

 were also shown of some of our common plants which 

 live in such different habitats and under such various 

 environmental conditions as those to be found on a sea- 

 shore, in a bog, on a heather moor, &c., and the adaptations 

 in structure for life under the conditions in each case were 

 illustrated. Finally it was suggested that there was plenty 

 of scope for field naturalists in studying more closely the 

 habitats of plants and the plants themselves which were asso- 

 ciated with such habitats. The distribution of such associa- 

 tions of plants could be studied and their limits recorded on 

 the maps of particular districts, so that vegetation maps of 

 the country could be produced, and thus our knowledge of 

 the geography of plants largely increased. 



The paper was illustrated by upwards of fifty lime-light 

 views, and on its conclusion Rev. C. H. Waddell, B.D., and 

 Professor G-regg Wilson, M.R.I. A., spoke to it. 



The President called the attention of members to the 

 Club-room Wednesday evenings, and hoped more of them 

 would avail themselves of these opportunities for giving and 

 receiving information, and announced that on the evening of 

 Wednesday, 1st February, he would read a paper entitled 

 " Half an Hour in Canterbury," and illustrate the same by a 

 series of lime-lig-ht views. 



