Coherent Identifier About this item: 20.500.12592/3p0d50

Journal of the Asiatic Society of Bengal Part II Natural Science 1887

1888

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Summary

After the addition of water and hydrochloric acid however the solution in the assay bottles could not be cleared by shaking ; the bulk of the silver chloride collected at the bottom of the bottles but the supernatant fluid remained turbid. [...] 4. The presence of a trace of bismuth in silver of high fineness is immediately detected in the ordinary coarse of assay by the Indian method but this bismuth interferes with the perfect accuracy of the results obtained by that process. [...] The contents of the beaker are then passed through a filter of which the weight of ash yielded by incineration is known and the carbonate of bismuth on the filter washed quite free of all traces of silver. [...] Whoa the proportion of bismuth is increased to 2 3 4 and 5 per mile the plan of cooling remaining the same the raggedness of the edges of the straps was somewhat increased but not very markedly. [...] The want of success which attended it seemed to be due to the very small amount of base metal in the bullion for the formation of a slag in which the bismuth oxide could be entangled and removed by skimming ; and possibly the reducing action of the plumbago pots used may have added to the difficulty.

Title Pages Author/Editor
X.—on the Effects Produced by Smalll Quantities of Bismuth on the Ductility of Silver.—by Surgeon-Major J. Scully Assay Master Calcutta 121-133 The Natural History Secretary

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XI.—on Monge’s Defferential Equation to All Conics.—by Asutosh Mukhopadhyay M. A. F. R. A. S. F. R. S. E. Communicated by the Hon’ble Mahendralal Sircar M.D. C.I.E 134-145 The Natural History Secretary

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XII.ȄNotes on the Indian Rhynchota Heteroptera No. 2 by E. T. Atkinson B. A. President 145-205 The Natural History Secretary

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XIII.—Natural History Notes from H. M.’s Indian Marine Survey Steamer 'Investigator ' Commander Alfred Carpenter R. N. Commanding. No. 4. Description of a New Species of Crustacea Belonging to the Brachyurous Family Raninidæ.—by J. Wood-Mason Esq. Superintendent of the Indian Museum and Professor of Comparative Anatomy and Zoology in the Medical College of Bengal Calcutta 206-209 The Natural History Secretary

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XIV.—Natural History Notes from H. M.’s Indian Marene Survey Steamer 'Investigator ' Commander Alfred Carpenter R. N. Commanding. No. 5. on Some Nodular Stone Obtained by Trawling Off Colombo in 675 Fathoms of Water.—by E. J. Jones A. R. S. M. Geological Survey of India 209-212 The Natural History Secretary

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XV.—Natural History Notes from H. M.’s Indian Marine Survey Steamer 'Investigator' Commander Alfred Carpenter R. N. Commanding. No. 6. on Six New Amphipods from the Bay of Bengal.—by G. M. Giles M. B. F. R. C. S. Surgeon-Naturalist to the Marine Survey 212-229 The Natural History Secretary

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XVI.—Natural History Notes from H. M.’s Indian Marine Survey Steamer 'Investigator ' Commander Alfred Carpenter R. N. Commanding. No. 8. the Mean Temperature of the Deep Waters of the Bay of Bengal. by Commander Carpenter R. N. D. S. O. F. R. Met. Soc. F. Z. S.—Communicated by the Superintendent of the Indian Museum 230-232 The Natural History Secretary

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Plates i-viii The Natural History Secretary

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Pages
123
SARF Document ID
sarf.120250

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