heidel’s metal.	455
Heidel’s Metal, Furnished by the Globe Electric Company, St. Louis, Mo.
Plate 6" by 6" lettered: “Heidel’s Metal, discovered Oct., 1898, St. Louis, Mo., U. S. A.” Samples taken from each edge of plate.
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No. of	Marks.			Sec- tional area.	Tensile strength.		Elongation in 2 inches.		Area at fracture.	Contraction of area.	Fractures.	Chemical analysis.		
test.					Total.	Square inch.	Inch.	Per cent.				Alumin- ium.	Silicon.	Iron.
10287	1	Inch. .750	Inch. .334	Sq.inch. .250	Pounds. 2,580	Pounds. 10,320	.22	11.0	In. In. Sq. in. . 68 X . 30 = . 204	Per cent. 18.4	iLight silvery gray, amorphous,	1 99.2	.48	.28
10288	2	.748	.349	.261	2,720	10,420	.22	11.0	. 68 X . 32 = . 218	16.5	\ spongy near one surface.