FURTHER CONSIDERATIONS ON THE ORIGIN OF THE 



HIMALAYA MOUNTAINS AND THE PLATEAU 



OF TIBET. 



(plates xxiii-xxxiii and XXVII bis AND XXXI bis.) 



By T. J. J. SEE. 



(Read April iS, 1913.) 



I. Introductory Remarks. 



The four memoirs dealing with the cause of earthquakes, moun- 

 tain formation and kindred phenomena connected with the physics 

 of the earth, which the writer had the honor to communicate to 

 this Society in the years 1906-08, and have pubHshed in the Pro- 

 ceedings, have laid the foundations of a new theory of the physics of 

 the earth's crust. The new theory already is widely adopted by the 

 most eminent investigators, and the purpose of the present paper is 

 merely to add a final confirmation of some interest. 



During the past five years the writer's attention has been so 

 fully occupied with the problems of cosmogony that the problems 

 relating to geogony, or the formation of the earth, have been left 

 largely in abeyance ; and yet some new light has been shed on them, 

 especially by the researches showing that the lunar craters are due 

 to impact, and thus in no way similar to terrestrial volcanoes, as was 

 so long believed. 



Quite recently it was thought worth while to reexamine the 

 phenomena of the earth's crust, in the light of the new science of 

 cosmogony, resulting from the researches of the past five years. 

 For in studying the problem of the origin of the Himalayas and the 

 plateau of Tibet some important considerations were brought out 

 that were not included in my former papers, and thus it seems 

 advisable to place them on record as confirming and extending my 

 former investigations. 



PROC. AMER. PHIL. SOC. , LII. 211 N, PRINTED SEPT. IJ, I9I3. 



