454	BRONZE AND BRASS.
CONSOLE BRONZE—Continued.
Marks.	Description.	Elastic limit per square inch.	Tensile strength per square inch.	Elonga- tion.	Contrac- tion of area.	Appearance of fracture.	Specific gravity.	Elongation of inch sections.
5 L I)	Recoil buffer, console metal.				 Riser, forged from 3"x 4 ' to 1« xl+ 	 Riser, elevating, slide nut, forged		Pounds. 26,800 21,200 17,000 18.400 15,600 20.400	Pounds. 57,200 50,840 65.000 35,920 34,400 48.000	Per cent. 27.5 44.7 35.5 3.0 3.5 7.0	Per cent. 30.6 47.2 37.1 5.0 5.0 8.4	Uniform light yellow, £" seam at center	 Uniform light yellow	 Golden, with dark spots			״ ״ // // 22 .,*33 . 36. ,41. ,*57. *42. ,29. 04.	,02. 05.	,02. *08. ,06.
								
						...		
MANGANESE BRONZE.
.07*,. 02
.30, .38* .23*
.18*,. 13
20,000 20,000 19,000 18,500	37,560 72,500 69,450 59,900	4.5 34.0 23.0 15.5	11.8 27.4 20.5 16.9	Light yellow, golden spots, with 30 per cent dark brown, spongy. Uniform light yellow	-		
				Light yellow, with black spots		
					
5״ barbette cradle..............
....do...........................
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Recoil spring centers, /״ mortar
CONNECTION, CAST BY THE WALWORTH MANUFACTURING COMPANY, BOSTON, MASS.
SPECIMENS FROM A 4-WAY HYDRAULIC
		11,240	25,210	7.0	10.7	Uniform light yellow	-	-----	 Light lavender yellow, opened cracks along		.08*,. 06 .07, .10*
		15,870	26,460	8.5				
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