MALLET, VINDHYAN SERIES. 7 



that are erroneous. It is, however, unnecessary to specify these, as his 



authorities respecting Central India were chiefly those already mentioned. 



In a paper by Mr. Everest^ the rocks met with on the route from 



Mirzaj)m- to Sagar are described, the observations 

 1833, Rev. R. Everest. 



being close and accurate, but from his being 



merely a route survey, little attempt could be made towards referring 



the different rocks to their relative stratigraphical positions. 



The trap formation of the Sagar District was describedf by Captain 

 1833, Captain S. Coul- Coulthard, who begins by pointing out its limits, and 

 then discusses the physical character of the country, 

 showing the different aspects which it presents, according as sand- 

 stone or trap prevails. The general elevation is described, of which the 

 neighbourhood of Sagar seemed to form the culminating portion. Captain 

 Coulthard then details the lithological character of the trap and the 

 included minerals, and those of the limestones very commonly found 

 associated with it. He inclined to the opinion that this Kmestone was 

 the " neighbom'ing lias" (Bundair limestone), " half calcined and dis- 

 guised by the trap.^^ The sandstone is then reviewed, which from its 

 lithological characters and horizontality, he concluded must be the lower 

 division of the new-red-sandstone. Details are further given of the 

 various routes by which he traversed the country, one of which crossed 

 the ferruginous beds of Hirapur (Bijawurs), and a map is appended at 

 the end of the paper, in which, as in Captain Franklin^s, the limits of the ' 

 trap and sandstone, as far as regards the Sagar country, are laid down 

 with a considerable degree of accuracy. 



In the same volume is a paper by Captain Franklin on the diamond 



mines of Punna, in which the mode of mining for 

 1833, Capt. J. Franklin. . -, • , • o .■ 



the gems and the various descriptions of diamond, 



&c., are described in detail. 



* Journal Asiatic Society, Bengal, Vol. II, p. 475. 

 t Asiatic Researches, Vol. XVIII, Part. I, p. 47. 



( 7 ) 



