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INTERNAL STRAINS IN GUN FORGINGS.	233
Breech Slice.
Interior diameter, 4".73; exterior diameter, 10".47. Original diameters of rings in the slice.
Diameters.		
A.	B.	Mean.
Inches. 4.8914 5.6505 9.6407 10.3135	Inches. 4.8947 5.6588 9.6532 10.3306	Inches. 4.89305 5.65465 9.64695 10.32205
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8979 5.6494 9.6401 10.3153	Inches. 4.8999 5.6581 9.6529 10.3240	Inches. 4.8989 5.65375 9.6465 10.31965
2				
3				
			
			
RINGS ALL DETACHED.
	5.6525	5.6615	5.6570
	9.6382	9.6470	9.6426
			
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0065 -.0011 -.0006 + .0018	Inch. + .0052 -.0007 -.0003 -.0066	Inch. + .00585 -.0009 -.00045 -.0024
			
			
			
			
SECOND TO THIRD PHASE.
2 detached		+.0031	+ .0034	+ .00325
3 detached		-.0019	-.0059	-.0039
FIRST TO THIRD PHASE.
	+ .0020	+ .0027	+. 00235
	-.0025	-.0062	-.00435
			
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