Geological Society. 571 



the phenomena considered, but also a careful account of Felicfs 

 celebrated experiments on this subject. It is probably in connexion 

 with his experimental researches rather than his theoretical work 

 that the name of Felici will go down to posterity. The dates of 

 publication of the three memoirs fall between 1854-55. Con- 

 sidering the enormous advance which has been made since that 

 time, it is hardly to be wondered at that Felici's interpretation 

 and mode of statement of certain phenomena partake of an archaic 

 character : more especially is this the case in the last memoir, 

 which is concerned with the so-called " unipolar " induction. The 

 short sketch of Felici's career at the end of the book fitly con- 

 cludes this reprint of his papers. 



LIX. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from p. 502.] 



March 7th, 1900.— J. J. H. Teall, Esq., M.A., F.H.S., President, 

 in the Chair. 

 r PHE following communication was read : — 



-*- 1. ' J^otes on the Geology of Gilgit.' By Lieut. -Gen. C. A. 

 McMahon, F.R.S., F.G.S. 



This paper is based on observations in the field made by Capt. 

 A. H. McMahon, C.S.I., C.I.E., F.G.S. , and Capt. J. R. Roberts, 

 I M.S., and on the petrological examination of the specimens sent 

 home by them. It is divided into three parts. Part I. refers to 

 the work of previous observers, and embodies a brief petrological de- 

 scription of the four granites and aplite intrusive in the sedimentary 

 rocks of Gilgit. Part II. consists of a topographical account of the 

 Gilgit rocks from Askole and Nanga Parbat on the south to the 

 northern passes leading into the Russian Pamirs. Part III. recites 

 the author's conclusions from the facts recorded in the paper. Briefly 

 stated, they are as fullows : — 



That at one period in the elevation of the Hindu Kush the strata 

 were thrown into a series of folds and compressed into a series of 

 uniclinal beds with a vertical dip. 



That the direction of the main drainage of the area was deter- 

 mined before, or at the commencement, of the last series of earth- 

 movements that crumpled up the strata. 



The sedimentary rocks were profusely invaded by granite and 

 diorite, and profoundly metamorphosed by contact-action. 



As regards the age of the rocks, the author gives his reasons for 

 identif}'ing the Gilgit limestones with the conformable Carbo-Triassic 

 series of the Himalaya. This series was mapped by Mr. R. 

 Lydekker, F.R.S., in the neighbouring district of Kashmir, and it 

 has been traced up to the border of Gilgit. Sir Martin Conway's 

 specimens, reported on by Prof. Bonney and Miss Raisin, enable the 

 author to connect it with the limestones of Gilgit. From this 

 correlation the author concludes that the oldest rock in the Gilgit 



