329
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, !".74; exterior diameter, 10".42. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.8660 5.6479 9.6466 10.2628	Inches. 4.8689 5.6471 9.6413 10.2573	Inches. 4.86745 5.6475 9.64395 10.26005
2..				
3					
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8719 5.6464 9.6455 10.2666	Inches. 4.8747 5.6462 9.6407 10.2453	Inches. 4.8733 5.6463 9.6431 10.25595
2					
3				
			
			
RINGS ALL DETACHED.
2 detached		5.6509	5.6505 !	5.6507
3 detached		9.6417	9.6370 I	9.63935
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch.	Inch.	Inch.
1 detached		+ .0059	+ .0058	+ .00585
	-.0015	-.0009	-.0012
	-.0011	-.0006	-.00085
4 detached		+ .0038	-.0120	-.0041
SECOND TO THIRD PHASE.
2 detached		+.0045	+.0043	+.0044
3 detached		-.0038	-.0037	-.00375
FIRST TO THIRD PHASE.
2	detached	 3	detached		+.0030 -.0049	+.0034 -.0043	+.0032 -.0046