297
INTERNAL STRAINS IN GUN FORGINGS
Breech Slice.
Interior diameter, 4".73; exterior diameter, 10".42. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.8810 5.6389 9.6561 10.2806	Inches. 4.8827 5.6440 9.6544 10.2735	Inches. 4.88185 5.54145 9.65525 10.27705
2				
3				
4					
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8837 5.6382 9.6556 10.2812	Inches. 4.8856 5.6433 9.6540 10.2714	Inches. 4.88465 5.64075 9.6548 10.2763
2				
3				
			
			
RINGS ALL DETACHED.
2 detached		5.6406	5.6459	5.64325
3 detached		9.6554	9.6499	9.65265 ;
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0027 -.0007 -.0005 + .0006	Inch. +.0029 -.0007 -.0004 -.0021	Inch. +.0028 -.0007 -.00045 -.00075
			
			
			
			
SECOND TO THIRD PHASE.
2 detached			+.0024	+.0026	+.0025
3 detached		-.0002	-.0041	-.00215
FIRST TO THIRD PHASE.
2 detached		+.0017	+ .0019	+. 0018
3 detached		-. 0007	-.0045	-.0026