287
INTERNAL STRAINS IN GUN FORGINGS
Breech Slice.
Interior diameter, 4".78; exterior diameter, 10". 44. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9362 5.6556 9.6550 10.2725	Inches. 4.9375 5.6520 9.6523 10.2680	Inches. 4.93685 5.6538 9.65365 10.27025
2				
3				
4						
			
Bings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.9425 5.6543 9.6540 10.2608	Inches. 4.9444 5.6504 9.6514 10.2698	Inches. 4.94345 5.65235 9.6527 10.2653
2				
3				
			
			
RINGS ALL DETACHED.
2 detached		5.6597	5.6564	5.65805
3 detached		9.6495	9.6468	9.64815
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. +.0063 -.0013 -.0010 -.0117	Inch. +.0069 -.0016 -.0009 + .0018	Inch. + .0066 -.00145 —.00u95 -.00495
2				
3				
			
			
SECOND TO THIRD PHASE.
2 detached		+.0054	+.0060	+.0057
3 detached		-.0045	-.0046	-.00455
FIRST TO THIRD PHASE.
2 detached		+.0041	+.0044	+ .00425
3 detached		-.0055	-.0055	-.0055