IV. METALLURGY AND CHEMISTRY 



1428. Aakon, C. H. Assaying of tin ores. 



Assaying, pts. II and III, 1900, San Francisco, pp. 127-128. . 

 Short account of methods used in assaying tin ore. 



Agricola, Geoegius. See No. 1277. 



1429. Allard, — . Crystallization of tin. 



Ann. Indust. nat. etr., April, 1820, Paris. 



Translated and abstracted by Editor Amer. Journ. Sci. Arts, 1st ser., Vol. 17, 1830, 

 New Haven, pp. 206-2CS. 



A method of producing " moire mftallique " on tin plate by the application of 

 acids and heat. 



1430. Ai.LEX, Alfred H. On metastannic acid and the detection and estimation 



of tin. 



Chem. News, Vol. 25, 1872, London, pp. 170-in. 



Abstract of paper read before the Chemical Society, March 7, 1872. 



Finds that matastannie acid is much more soluble in acids than had been supposed 

 by Fresenius and others, and that ordinary stannic sulphate is formed by treatment 

 with hot HjSO^. Uses this reaction in the estimation of tin in alloys. 



1431. AixEx, J. F. On the alloys of tin, zinc, lead and other metals with 



manganese. 



Rep. Brit. Ass. Adv. Sci. 40th meeting, September, 1870, Liverpool, pt. 2, 1871, 

 London, pp. 50-51. [Abs.] 



Makes manganese-copper alloy from the oxides, then adds tin or other metal, 

 forming an alloy that can be rolled or cast for bearings, etc. 



1432. Anonymous. Improved method of estimating tin. 



Mg. Journ. Railw. Comm. Gaz., Vol. 20, 1850, London, p. 48!). 



" Hitherto in chemical analysis tin has always been estimated in the form of stan- 

 nic acid (peroxide of tin) The new method depends on the facility 



with which protochloride of tin withdraws chlorine from bodies capable of furnish- 

 ing it." 



1433. . Properties of the alloys of copper and tin. 



Iron Age, Vol. 24, 1879, Dec. 4, New York, p. 15; Dec. 11, pp. 9, 11; Dec. 18, p. 3. 

 Gives results of torsional, compressive and transverse stress tests; analyses and 

 specific gravities; and a comparion of the ductilities of various bronzes. 



1434. . Disintegration of tin. 



Mg. Soi. Press, Vol. 44, 1882, San Francisco, p. 275. 



Short discussion of the cause of tlie disintegration of tin from cold. Tlieory 

 advanced that it is due to crystallization, possibly to dimorphism. 



1435. . Recovering tin from scrap tin. 



Mg. Sci. Press, Vol. 49, 1884, San Francisco, p. 51. 



Describes a process of tin recovery hy oxidizing the tin on tin scrap in heated air. 



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