1893-94-] Some Recent Researches on Grafting. 107 



earth may be compared to a cannon-ball which has been 

 exposed to the weather for a number of years: the surface 

 or crust is entirely composed of oxide of iron, while the 

 interior still preserves its metallic character; and our en- 

 deavours to pierce the crust of the earth may be likened to 

 the scratch of a pin on the coating of rust which surrounds 

 the cannon-ball. 



Of all the problems relating to the interior of the earth, 

 that one respecting the physical condition is the most obscure. 

 New theories and conjectures are in the air, and perhaps 

 before long some one with an unusually keen insight in 

 matters of this sort may propound a solution of the difficulty 

 which will agree better with observed facts than any yet 

 suggested. 



At the evening meeting of January 25, 1894, Emeritus 

 Professor Struthers delivered an address on the subject of 

 " Evidence of the Descent of the Horse of the present day 

 from a many-toed Ancestor." The address was illustrated by 

 a number of diagrams. 



IV.— SOME RECENT RESEARCHES ON GRAFTING, 

 AND THEIR BEARING. 



By Mr WM. C. CRAWFORD, M.A. 



(Read Feb. 22, 1894.) 



The paper gave an account of the elaborate researches on 

 grafting conducted during many years by Professor Vochting 

 of Tubingen, and recently published by him — « Ueber Trans- 

 plantation am Pflanzenkorper,' 1892. It was illustrated by 

 numerous lantern slides. 



