TABLES Nos. I. and 11., 



SJ.o.ing t;,e Ckemioal and Pnysical Proj.n.s oj U. Mur.io Allays „f 0,,yer a,ul Zin., unU .f C.,,cr a.ul Ti 



7th to denote character of fracture :— F.C. Fine Crystalline, C.C. Coarse Crystalline, T.C. Tabular Crystalline, F.F Fine Fibrous, C. Conchoidal. V.C. Vitreo-Conchoidal, V. Vitreous, 



Abbieviationa used 

 E. Earthy. 



The maxima of ductility, malleability, hardness, and fusibility, are = 1 

 The numbere in Column 6th denote intensity of shade of the same colour, 



The atomic weights are those of the hydrogen scale. 



l^e6r^ificgTayitie8werede^rminedbythemethodindicatedmReport''On Action of Air and Water on Iron." Trans. Brit. Ass. \ 

 prisms of U'25 of an inch square, without having been hammered or compressed after being i 





3 Mossleman's, from Belgium ; and the tin " grain t 



The ultimate cohesion 

 before disrupt! on. 



The copper used in these alloys was granulated, and of the finest " tough pitch ;" the 

 by oxidation, and the resulting alloy verified by analysis. 



No simple binary alloy of Cu. + Zn, or of Cu. + Sn. works as pleasantly in turning, planing, or filing, as if combined with a very small proportion of a third fusible metal, generally Cu, H- Zn. 4- tb. ; or 

 Zn, as u Icnown to workers in metals. 



[PllOCEEDl>GS It. I. A. 



eights given are those which each prism just sustained for a few seconJb 



from Cornwall. They were alloyed in a peculiar apparatus, to avoid loss 



Cu. -{- Sn. + 



