192 _ LINNEAN SOCIETY OF LONDON. 
Dutch, but not a day too soon, as the trees take at least twenty 
years ere they are productive and valuable-—Mr. Patrick Geddes 
| 8 
and Animals.” The fact of organic evolution is no longer denied, 
but its physiological factors have not yet been adequately analyzed. 
Eyen those who regard natural selection as at once the most 
viz., to interpret all phenomena of form and function of cells, 
tissues, organs and individuals alike in terms of its constructive and 
ea gall (‘‘anabolie and katabolic’’) changes. While the ex- 
e i i she 
eps oe roduct 
application to the origin and modification of flowers, &c., outlined. 
A discussion is given of the embryological and pathological factors 
of internal evolution, with an outlined application of the whole 
argument to the construction of a genealogical tree of plants and 
animals, 
