316 Mr Breton ow the Topography ^ Animals^ 4t. 



latter crystallizes from more concentrated solutions at higher 

 temperatures than the former. The descriptions published 

 of the salt discovered by Marx are not so perfect as to render 

 superfluous either the drawing given here Fig. 10, or the 

 measures of the angles, though the latter be given only as 

 approximations. Mr Clark has succeeded in discovering an 

 analogous case to Marx''s salt among the phosphates of soda ; 

 for the salt which he obtained by exposing a concentrated 

 solution of phosphate of soda to evaporation in a calico-prin- 

 ter'^s stove, agrees in regard to form exactly with that arseniate 

 of soda, the crystals being likewise similar to Fig. 10. Though 

 regularly formed, and of considerable size, their surface was 

 not bright enough to admit of a very exact measurement, 

 which perhaps might have shown some slight deviation in the 

 angles of the two substances. 



Art. XXI. — On the Topography, Animals, and Reptiles of 

 some districts in India. By P. Breton, Esq. 



Ix the second volume of the Transactions of the Medical and 

 Physical Society of Calcutta there is a valuable paper by Mr 

 Breton on the medical topography of the districts of Ramghur, 

 Chota Nagpore, Sirgoojah, and Sumbhulpore, and a description 

 of the animals and reptiles met with in these districts. These 

 provinces, the theatre of Mr Breton''s travels for a series of 

 years, are from three to four hundred miles from the sea, and 

 the surface is variegated with forests, deep jungle, vallies, and 

 plains. The plains in some parts are extensive. Those of 

 Chota Nagpore and Sirgoojah (lat. 23° & 11'' N.) extend in 

 some parts many miles, and are for the most part cultivated. 

 The chains of mountains run east and west. Some are conti- 

 nuous for many miles, others interrupted, and the highest does 

 not probably rise above 2000 feet from the base, or 6000 feet 

 above the level of the sea. These provinces are intersected by 

 considerable rivers, the chief of which are the MahaNuddee, the 

 Ebe, Koel, Sunk, Baira, Hutsoo, and Dummoodah, the nume- 

 rous tributaries to which afford the natives the means of irriga- 

 tion forseveralmonthsaftertheterminationoftherains. Villages 

 are interspersed over the face of the country, not only in the 



