259
INTERNAL STRAINS IN GUN FORGINGS,
Muzzle Slice.
Interior diameter, !".15; exterior diameter, 8".52. Original diameters of rings in the slice.
Diameters.		
A.	B.	Mean.
Inches. 4.2928 5.1424 7.1562 8.3191	Inches. 4.2915 5.1494 7.1512 8.3114	Inches. 4.29215 5.1459 7.1537 8.31525
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches.	Inches.	Inches.
	4.2976	4.2968	4.2972
2		5.1415	5.1487	5.1451
3		7.1553	7.1507	7.1530
4 detached		8.3218	8.2985	8.31015
RINGS ALL DETACHED.
	5.1431	5.1500	5.14655
	7.1518	7.1489	7.15035
			
Muzzle strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0048 -.0009 -.0009 + .0027	Inch. +.0053 -.0007 -.0005 -.0129	Inch. +.00505 -.0008 -.0007 -.0051
			
			
			
			
SECOND TO THIRD PHASE.
	+ .0016	+.0013	+ .00145
3 detached		-.0035	-.0018	-.00265
FIRST TO THIRD PHASE.
2 detached		+ .0007	+ .0006	+.00065
3 detached		-.0044	-.0023	-.00335