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46, 47. Genus Lagomys, L. Nipalensis et Royli. Both are said to be ray common in Tibet, even much more so than in the Himalayan districts: but I have no specimens from beyond the snows, and trust to native information upon sight of the skins in my possession. The whole srrcund on the way from Kooti to Digurchee is said to be often covered by immense groups of Lagomydes, whose burrows render the roads unafe for horsemen. The Arctomides collect in the same manner, but in much smaller numbers.

Nepal, 2d April, 1842.

N. B. Those who would consult this Tibetan Catalogue with advantage, had better first refer to the Catalogue of Nipalese Mammals, published in the last No. of the Journal.

Plates attached to this Paper.

1. Vulpes Fenilatus.

2. Felis Nigripectus.

3. Lepus Pallipes.

4. Oris Hoonia, tame.

Same concluding Remarks forwarded for insertion with Capt. TkkmenHesbk's Report on the Tin Ground of Mergui.

Of the existence of tin in considerable quantities in the province of Mergui, there cannot, from the facts above stated, be much question; nd from the trial of the produce of one man's labour in a given time, there appears to be sufficient to justify every expectation of a profitable employment of labour on an extensive scale.

The places at which the trials were made, were not selected u the best from previous information, but were arrived at more by accident than design, and the stanniferous gravel and sand collected 'We the bed was tolerably level, stream slack, and where the greatest deposit appeared to have recently occurred.

No part of the bed of the Thabawlick, which was examined, was found wholly destitute of tin, and it is reasonable to conclude, that the we exists in numerous spots, especially in the vicinity of the hills from which the streams arise, in far greater abundance than is shewn above.

The results, therefore, which are given in detail, can only be considered rough approximations to the quantity of tin these streams would afford, and to the probable out-turn with an establishment properly superintended. Much economy in labour might be effected in collecting the sand and gravel for the washers, but no better mode eould, I think, be adopted in separating the tin in the first instance, than by people accustomed to work with the flat conical-shaped troughs before described. The quantity obtainable, would fully repay the employment of men in this operation.

The tin, as produced by the washers, should be placed on sloping boards, and water conducted over it from a trough pierced with holes for the purpose, in order to get rid of foreign particles; and it would then, after being finely pounded, be ready for smelting. Of all metals tin is in this process the least troublesome, after the ore is freed from the earthy and silicious particles with which in other countries it is often mixed.

The crystallized form in which it here occurs, renders its separation extremely easy, and the whole processes of stamping and dressing, which in England are tedious and expensive, can thus be dispensed with. No arsenic or sulphur being mixed with the ore, it need not be roasted before it is placed in the smelting furnace.

It would thus appear that the tin of the Mergui province offers no ordinary inducement to the outlay of capital, without much of the risk, uncertainty, and large previous outlay usually attending mining adventures.

G. B. Tremenheere, Capt. Superintendent of Forests, Tenasserim Provinces.

Errata in the printed Report.

Page 846, line 10, et passim, for Tbengdon, read Thengdaw.

— 8*8, ,, 16, for Pak chum, read Pak chan.

— 849, ,, 17, for Loundoangin, read Londamgin.

— 8*9, ,, 18, for Wolf ran, read Wolfram.

— 850, ,, SS, for 63-176 grains, read 6 oz. 176 grains.

— 8S1, ,, 14, for Koban, read Kahan.

On the Cotton called "Nurma," in Guzerat. By A. Burn, Esq., Superintendent of Cotton Cultivation, (inreply to Mr. Piddingion's Queries J Communicated from the Secretariat, General Department.

The plant yielding what is called Nurmah cotton in this part of the country, is the same as is described by Dr. J. F. Royle as Glossypium Arborium. It is to be found growing wild, I believe in different parts of India, and from some experiments I made when at Kaira, I have very little doubt that it will be found to be the original stock from whence the Barbadoes, Bourbon, Egyptian, and Sea Island varieties hare originally sprung,

It grows in every kind of soil that is met with in Guzerat. But it obtains the greatest perfection in light sandy soils, to which a little old cow-dung manure has been added, and where it can have a proper drainage, in the black clayey soil, known as "the cotton soil" of the indigenous G. herbaceum; it grows, but with diminished vigour in pro

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