327
INTERNAL STRAINS IN GUN FORGINGS,
Muzzle Slice.
Interior diameter, 4".15; exterior diameter, 8".57. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches.	Inches.	Inches.
	4.3006	4.3006	4.3006
	5.1461	5.1501	5.1481
	7.1458	7.1456	7.1457
	8.2470	8.2392	8.2431
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings. *		Diameters.	
	A.	B.	Mean.
	Inches. 4.3036	Inches. 4.3026	Inches. 4.3031
	5.1457	5.1497	5.1*77
	7.1455	7.1453	7.1*54
4 detached		8.2466	8.2432	8.2**9
RINGS ALL DETACHED.
	5.1458	5.1514	5.1486
3 detached		7.1445	7.1434	7.i*395
Muzzle strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. +.0030 -.0004 0003 -.0004	Inch. +.00‘>0 -.0004 -.0003 +.0040	Inch. +.0025 -.0004 -.0003 +.0018
			
			
			
			
SECOND TO THIRD PHASE.
	+.0001	+.0017	+.0009
3 detached		-.0010	-.0019	-.00145
FIRST TO THIRD PHASE.
	-.0003	+.0013	+ .0005
3 detached		-.0013	-.0022	-.00175