468 Prof. T. G. Bonuey and Miss C. A. Raisin. 



d'arbres innombrables, lea cellules pyramidales, qui, grace a une culture 

 intelligent^, peuvent multiplier leurs branches, enfoncer plus loin 

 leurs racines, et produire des fleurs et des fruits chaque foi.s plus varies 

 et exquis. 



Du reste nous sommes tres loin de croire quo ITiypothese que nous 

 venons d'esquisser puisse a elle seule expliquer les grandes differences 

 quantitatives et qnalitatives que presente le travail cerebral chez les 

 divers animaux et dans la meme espece animate. La morphologie 

 de la cellule pyramidale n'est qu'une des conditions anatomiques de 

 la pensee. Or cette morphologie spi'cialo ne suffira jam a is a nous 

 expliquer les enormes differences qui existent au point de vue fonc- 

 tionnel entre la cellule pyramidale d'nn lapin et celle d'un homme, 

 ainsi qu'entre la cellule pyramidale de 1'ecorce cerebrale et le cor- 

 puscule etoile de la moelle ou du grand sympathique. Aussi a notre 

 avis est-il tres probable qu'en outre de la complexity de leurs 

 rapports les cellules pyramidales possedent encore une structure 

 intraprotoplasmique toute speciale, et meme perfectionnee dans les 

 intelligences d'elite, structure qui n'existerait pas dans les corpnscules 

 de la moelle ou des ganglions. 



" On Rocks and Minerals collected by Mr. W. M. Conway in 

 the Karakoram Himalayas." By Professor T. G. BONNET, 

 D.Sc., F.R.S., and Miss C. A. RAISIN, B.Sc. Received 

 February 15, Read April 19, 1894. 



During his journey in the Karakoram Himalayas, Mr. W. M. 

 Conway collected more than 300 specimens of rocks and minerals, 

 which, however, were generally rather small. These were sent to 

 us for examination at University College, London. Thin slices have 

 been prepared of the specimens which promised to be the more 

 interesting. Of the rest, the mineral composition was verified in cases 

 of doubt by examining pulverised fragments under the microscope. 



Since the detailed results of our examination, which practically 

 form an annotated catalogue of the specimens, will be printed as an 

 appendix to Mr. Conway's forthcoming volume,* we restrict ourselves 

 in this paper to a summary of our work, and to a notice of a few 

 specimens which appear to be of more than local interest. 



(1.) General Description. 



Commencing with the crystalline rocks, and with the most basic of 

 these, we find one specimen of a dark green serpentine, containing 



* Since this paper was read, the first or descriptive part of the work has been 

 published (' Climbing and Exploration in the Karakoram-Himalayas '), which gives 

 the positions of the localities mentioned herein. 



