279
INTERNAL STRAINS IN GUN FORGINGS.
Breech Slice.
Interior diameter, 4".76; exterior diameter, 10".45. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9247 5.6537 9.6500 10.2732	Inches. 4.9215 5.6448 9.6415 10.2818	Inches. 4.9231 5.64925 9.64575 10.2775
2				
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.9277 5.6528 9,6495 10.2697	Inches. 4.9240 5.6436 9.6408 10.2865	Inches. 4.92585 5.6482 9.64515 10.2781
2				
3						
			
			
RINGS ALL DETACHED.
2 detached		5.6551	5.6480	5.65155
3 detached		9.6488	9.6370	9.6429
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0030 -.0009 -.0005 -.0035	Inch. +.0025 -. 0012 -.0007 +.0047	Inch. +.00275 -.00105 -.0006 +.0006
			
			
			
			
SECOND TO THIRD PHASE.
2 detached		+.0023	+.0044	+.00335
3 detached		-.0007	-.0038	-.00225
FIRST TO THIRD PHASE.
2 detached		+ .0014	+ .0032	+.0023
3 detached		-.0012	-.0045	-.00285