157
INNER BASES---15-POUNDER GUN MOUNTS.
No. 7314.
Marks, ib°i5 Diameter, ".505.
Sectional area, .20 square inch, (ranged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successive permanent set.	Remarks.
Pounds.	Inch.	Inch.	Inch.		
1,000	0.	0.	0.	0.	
5,000	.00010	.00010	0.	0.	
10, 000	.00025	.00015			
20,000	.00060	. 00035			
30,000	. 00105	.00045			
33,000	.00120	.00015			
34,000	. 00125	. 00005			Elastic limit.
35,000	.00700	. 00575			
36,000	.00760	. 00060			
37,000	.00840	.00080			
38,000	.00915	.00075			
39,000	.01000	.00085			
79,050			::::::::::::		Tensile strength.
.....................pounds.. 79,050
..........................do... 34,000
........................inch.. .2000
..........................do... .00125
.........................do...	.065
............................... 23.9
...................... ".70 from neck
granular 50 per cent, silky 50 per cent
*23.״ ,17.״ ..........................
General summary.
Tensile strength per square inch of original section...
Elastic limit per square inch of original section.
Elongation per inch after rupture.............
Elongation per inch under strain at elastic limit.
Reduction in diameter at point of rupture..............
Reduction in area after rupture, per cent of original section..
Position of rupture....................................
Character of broken surface............7.777.7. .7.7...
Elongation of inch sections................777777......
No. 7315.
Marks, !VS,
Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successive permanent set.	Remarks.
Pounds.	Inch.	Inch.	Inch.	Inch.	
1,000	0.	0.	0.	0.	
5,000	.00010	.00010	0.	0.	
10,000	.00030	. 00020			
20,000	.00070	.00040			
25,000	.00100	.00030			
27,000	.00110	. 00010			
28,000	.00115	.00005			Elastic limit.
29,000	.00130	.00015			
30,000	.00290	.00160			
31,000	.00525	.00235			
32,000	.00700	. 00175			
33,000	.00755	.00055			
34,000	.00890	.00135			
73,400					Tensile strength.
.....................pounds.. 73,400
........................do...	28,000
.......................inch.. .1800
........................do...	.00115
........................do—	.055
.............................. 20.5
........................ 1״	from neck
granular 75 per cent, silkv 25 per cent
17.״ ,*19.״ ..........................
General summary.
Tensile strength per square inch of original section...
Elastic limit per square inch of original section ...
Elongation per inch after rupture..............
i Elongation per inch under strain at elastic limit.77.7.7.
Reduction in diameter at point of rupture..............
Reduction in area after rupture, per cent of original section
,Position of rupture................................
Character of broken surface.............7..............
Elongation of inch sections................