Native Calcutta Society. — Geology of 'the Ganges. 149 



of Plants. — M. Poncelet, Capt. Eng., presented a manuscript 

 work entitled A Memoir on the General Theory of Reci- 

 procal Polarity, in continuation of his Memoir on the Centres 

 of Mean Hermonics. — M. Magendie, for himself and M. 

 Gay-Lussac, read a Report upon a Memoir of M. Chevreul, 

 on several subjects of Organic Chemistry. The memoir was 

 approved by the Academy, and will be printed in the Becueil 

 dcs Savons Strangers. — M. Bosc made a verbal Report on a 

 notice addressed from Moscow, by M. Fischer, relative to an 

 Insect known in Persia by the name of Mianah. — M. Ampere 

 read, for himself and M. Becquerel, a note on an experiment 

 relative to the Nature of the Electric Current. 



NATIVE CALCUTTA SOCIETY. 



A Literary Society has been founded at Calcutta, by native 

 Indians of distinction, the object of which is truly praise- 

 worthy. It is intended to enter into discussions on all sub- 

 jects connected with the progress of civilization and literature. 

 Works of learning and general utility are to be published in 

 English ; and little manuals of morals and science, tending to 

 impugn certain inveterate customs, and to lay down rules of 

 reibrmation conducive to the well-being of individuals in Ben- 

 gal. To promote these ends, mechanical and mathematical 

 instruments, together with a chemical apparatus, are to be 

 procured. A house is to be erected for the purpose of holding 

 their assemblies, and containing their different collections. A 

 College will be annexed for instruction in the arts and sciences. 



XXVI. Intelligence and Miscellaneous Articles. 



GEOLOGY OF THE GANGES AND JUMNA. 



pMlOM a paper on this subject read before the Calcutta 

 -*- Medical and Physical Society on the 3d of January last, 

 it appears that the rocks met with on the banks of these 

 streams present examples of almost all the varieties of cal- 

 careous, argillaceous, and siliceous compounds, from the se- 

 condary concretions of calc-tuff' (kunhir) found every where 

 in the river's bed, to the green stone of Pointy and the primi- 

 tive granite of Colgong and Juangira. Syenite and porphy- 

 • itic masses are also found at some points and fragments of 

 grey and white chalcedony. It is remarkable that no rolled 

 <>r angular pieces of rock are found in the nullahs proceeding 

 from the hills, by which the formation of the higher ranges 

 inighi be determined. The neighbourhood of Monghyr is 

 lingular in presenting ridges of qua) tz rock that rise to a con- 

 siderable. 



