269
INTERNAL STRAINS IN GUN FORGINGS,
Muzzle Slice.
Interior diameter, !".23; exterior diameter, 8".56. Original diameters of rings in the slice.
Diameters.
A.	B.	Mean.
Inches. 4.3799 5.1494 7.1405 8.4003	Inches. 4.3833 5.1414 7.1486 8.4095	Inches. 4.3816 5.1454 7.14455 8.4049
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.3831 5.1487 7.1400 8.4072	Inches. 4.3880 5.1411 7.1486 8.3987	Inches. 4.38555 5.1449 7.1443 8.40295
2				
3				
			
			
RINGS ALL DETACHED.
2 detached				5.1520	5.1436	5.1478
3 detached		7.1343	7.1445	7.1394
Muzzle strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0032 -.0007 -.0005 + .0069	Inch. + .0047 -.0003 .0000 -.0108	Inch. + .00395 -.0005 -.00025 -.00195
			
			
			
			
SECOND TO THIRD PHASE.
2 detached		+.0023	+.0025	+ .0029
3 detached		-.0057	-.0041	-.0049
FIRST TO THIRD PHASE.
2 detached		+.0026	+ .0022	+ .0024
3 detached		-.0062	-.0041	-.00515