Tanners' and Chemists' Handbook (Google eBook)

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S.E. Tate Printing Company, 1909 - Tanning - 363 pages
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Page 62 - Sample must be dried at a temperature not exceeding 60 and then ground to such a degree of fineness that the entire sample will pass through a sieve of 20 meshes to the inch (linear). 3. Amount of Sample and Proportion of Water for Extraction. For fresh materials the amount of sample and proportion of water for extraction should be such as to give between 0.350.45 grm.
Page 229 - Specific Gravity determinations were made at 60 F., compared with water at 60 F. From the Specific Gravities the corresponding degrees Baume were calculated by the following formula: 1ЛК Baume = 145 - -
Page 232 - " " 1 F. AUTHORITY WC FERGUSON. This table has been approved and adopted as a Standard by the Manufacturing Chemists' Association of the United States.
Page 63 - At least 400 cc. of the first portions of extractive solution should be removed and not subjected to further heating. A thin layer of cotton must be used in order to prevent fine material passing over.
Page 227 - Baume Hydrometers for use with this table must be graduated by the above formula which formula should always be printed on the scale. Atomic weights from FW Clarke's table of 1901.
Page 63 - ... dry" basis. The tannin in fresh materials should also be reported on the basis of the moisture content of the sample "as received.
Page 78 - Selenium Se 79.2 Silicon Si 28.3 Silver Ag 107.88 Sodium Na 23.00 Strontium Sr 87.63 Sulphur S 32.06 Tantalum Ta 181.5 Tellurium Te 127.5 Terbium Tb 159.2 Thallium Tl 204.0 Thorium Th 232.15 Thulium Tm 168.5 Tin Sn 118.7 Titanium Ti 48.1 Tungsten W...
Page 224 - Acids stronger than 66 Be should have their percentage compositions determined by chemical analysis. * Calculated from Pickering's results, Journal of London Chemical Society, vol.
Page 50 - ... introduced in a moderate stream. The flask is set in a vessel with water to keep it cool. The acid is rapidly absorbed, and, after about 45 minutes, the esters separate, floating in the solution, and no more hydrochloric acid is absorbed. The current of gas is now stopped, and the flask allowed to stand for half an hour to complete the reaction. The liquid is diluted with about 5 times its volume of water and boiled until the acid solution is clear, the esters, with...
Page 6 - If the existence of a base metal alloyed with the platinum is suspected, immerse the article in question first in boiling HC1 for a few minutes, then, after thorough rinsing with clean water, immerse in boiling HN03 free from chlorine.

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