GENERAL DESCRIPTION OF AREA AND ROCKS. 3 



The importance of the coal -supply for the great trunk railways of 

 India, has hitherto rendered the examination of the fields south of the 

 Ganges more pressing, from an economic point of view, than the 

 exploration of an out-of-the-way corner of India like Darjiling. The 

 connection of Calcutta with the hills by the Northern Bengal State 

 Railway, has recently, however, given the question of the existence of coal 

 in the Sikkim mountains a new importance. Copper mines have been 



1850. — Examination and analysis of an orange-yellow earth brought from the 



Sikkim Territory by Dr. Campbell, Darjiling, and said to be used there 



as a cure for goitre. By Henry Piddington, Esq. — Ibid, Vol. XIX, 



p. 143. 

 1852. — Notice of graphite sent by Captain Sherwill from Karsiang. By H. Pid- 

 dington, Esq.— Ibid, Vol. XXI, p. 538, 

 1853. — Notes upon a tour in the Sikkim Himalaya mountains, undertaken for 



the purpose of ascertaining the geological formation of Kanchinjinga 



and of the perpetually snow-covered peaks in its vicinity. By Captain 



Walter Stanhope Sherwill, Revenue Surveyor. — Ibid, Vol. XXII, pp. 540, 



611. 

 1854. — Correspondence respecting the discovery of copper ore at Pushak, near 



Darjiling. Dr. A. Campbell and H. Piddington, Esq.— Ibid, Vol. XXIII, 



p. 206. 

 1854.— Examination and analysis of Dr- Campbell's specimens of copper ore 



obtained in the neighbourhood of Darjiling. By H. Piddington, Esq. 



Ibid, Vol. XXIII, p. 477. 

 1855.— Correspondence respecting Darjiling copper ore. Dr. A. Campbell.— Ibid, 



Vol. XXIV, p. 706. 

 1856.— Geological observations in Sikkim. H. Schlagintweit, Esq. — Ibid, Vol. 



XXV, p. 22. 

 1861. — Description of a native copper mine and smelting works in the Mahanaddi 



Valley, Sikkim Himalaya. Communicated by H. F. Blanford, Esq. — 



Percy's Metallurgy, Vol. I, p. 388. 

 1862. — Journal of a trip undertaken to explore the glaciers of the Kanchunjinga 



group in the Sikkim Himalaya in November 1861. By Major J. L. 



Sherwill, Revenue Surveyor.— Journal, Asiatic Society, Bengal, Vol. 



XXXI, p. 457. 

 1865.— Notes on the sandstone formation, &c, near Baxa Fort, Bhutan Duars. 



By Captain H. H. Godwin-Austen, p. r. Q. S., Surveyor, Topographical 



Survey.— Ibid, Vol. XXXIV, pt. 2, p. 106. 

 1868. — Notes on geological features of the country near foot of hills in the 



Western Bhutan Duars. By Captain H. H. Godwin-Austen, p. r. a. S., 



&c.-lbid, Vol. XXXVII, pt. 2, p. 117. 



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