362 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 4, 



3. I leave my palaeontological collections, which fill three large 

 boxes and are of great value, to the care of our friend De Verneuil. 

 I cannot, however, refrain from mentioning some Jurassic ammonites 

 found at a distance of eight hours to the south of Angora. These 

 prove the existence in this place of a patch of Oxford clay, as M. 

 Alcide d'Orbiguy at the first glance recognized all the ammonites as 

 characteristic of this formation. 



4. The results obtained in my ascent of Mount Argaeus are very 

 interesting, but I shall not trespass further on your patience with 

 details. It is sufficient to say that I returned four times to Kaisaria, 

 and spent five months in investigating the structure of this remark- 

 able volcanic giant and the surrounding country, which I have com- 

 pletely delineated on a large geological map. 



I have not only determined the altitude of above 500 localities by 

 means of the temperature of boiling water, but have also established 

 meteorological observations, furnished with the best instruments, ba- 

 rometers, thermometers and hygrometers, procured at great expense 

 from Paris, at Constantinople, Kaisaria, Smyrna, Trebisonde and 

 Tarsus. From Constantinople and Kaisaria I have already a con- 

 tinuoils series of observations for two years, and from Trebisonde for 

 six months, and I intend that they shall be kept up for at least three 

 years longer. 



April 4, 1849. 



The Rev. E. Prout, John Bentley, Esq., and Lieut.-Colonel Reid, 

 C.B., were elected Fellows of the Society. 



The following papers were then read : — 



1 . Observations on the Geology of Asia Minor, referring more 

 particularly to portions o/Galatia, Pontus «?zc? Paphlagonia. 

 By W. J. Hamilton, Esq., Sec. G.S. 



Before I proceed to the chief object of this memoir, I consider it 

 an act of justice to my fellow-traveller Mr. Strickland and to myself, 

 to offer a few observations to the Society on some of the statements 

 contained in the recent notice of M. Tchihatcheff. 



These statements refer mainly to two points, viz. the palaeozoic 

 rocks in the neighbourhood of Constantinople, and the age of the red 

 sandstone and overlying formations in the more eastern districts of 

 Asia Minor. 



1°. With regard to the palaeozoic rocks near Constantinople, M. 

 Tchihatcheff first states that I have called them Silurian instead of 



thorough development of the subject {and M. de Tchihatcheff has again returned 

 to Asia Minor on this account solely) will, 1 trust, prove a striking confirmation 

 of the general view I have put forth concerning the tertiary eocene age of all 

 the " terrain nummulitique " in Asia as well as in Africa and Europe. 



Rod. I. MuRCHisoN, Sept. 27, 1849. 



