OAST IRON AND PIG IRONS.
Cast Iron Furnished by Private Parties—Continued.	^
No. of test.	Mark.	Description.	Chemical composition.								Diam- eter,	Tensile strength per square inch.	Fracture,	Specific gravity.
			Carbon.			Man- ga- nese.	Sili- con.	Sul- phur.	Phos- phorus.	Cop- per.				
			Total.	Graph- itic.	Com- bined.									
6472 6473 6474 6475 6476 477 6478	Heat 12 Heat 13־ Heat 14 Heat 15 Pleat 16 Heat 17 Heat 18	Common shell, 15-pouncler										Inches. .505 .505 .505 .505 .505 .505 .505	Pounds. 22.400 23.000 22,050 28,900 27.000 27.400 29.000		
														
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Pig Irons.
6451 6452 6507 6511 6517 6518 6519 6536 6537 6538 6539 6540 6541 6497 6580 6583	1 2 T. 1 pig T. 2 pig 3 - 3 3 1 2 3 1 2 3 3	Salisbury pig, No. 4										1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129 1.129	26.500 23,650 27.200 31,600 35.300 29,700 35,900 28.200 28.500 21.500 35.500 31,000 24,100 9,310 12.500 22.300	Granular, medium, and fine interspersed.	7.187 7.148 7.198
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			do	 	do		3.015	2.290	0.725		1.770	0.120						
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			do													7.231 7.251 7.147
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			do												Fine and medium coarse gran.. Fine granular, light gray		
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			do												Fine and medium granular, gray. Coarse and fine granular, interspersed brilliant facets. Medium coarse and fine granular, dark gray. Fine granular, gray		6.970 7.012 7.166
		No. 1 soft pig	 Pig from Watervleit Arsenal	 Mu irk irk		3.136 3.021 3.380	2.783 2.808 3.300	0.353 0.213 0.080	0.650 0.47Ö	2.500 1.850 1.700	0.017 0.050 0.065	0.630 0.3Ô6