255
INTERNAL STRAINS IN GUN FORGINGS,
Muzzle Slice.
Interior diameter, 4".27; exterior diameter, 8".58. Original diameters of rings in the slice.
* Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.4373 5.1557 7.1560 8.4015	Inches. 4.4398 5.1596 7.1600 8-. 3974	Inches. 4.43855 5.15765 7.1580 8.39945
2			
3				
4				
			
Rings 1 and •I detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.4429 5.1550 7.1555 8.3973	Inches. 4.4460 5.1588 7.1596 8.3926	Inches. 4.44445 5.1569 7.15755 8.39495
2				
3				
			
			
RINGS ALL DETACHED.
	5.1570	5.1607 7.1554	5.15885 7.15475
	7.1541		
			
Muzzle strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0056 -.0007 -.0005 -.0042	Inch. +.0062 -.0008 -.0004 -.0048	Inch. +.0059 -.00075 -.00045 -.0045
			
			
			
			
SECOND TO THIRD PHASE.
	+ .0020 -.0014	+ .0019	+ .00195 -.0028
		-.0042	
			
FIRST TO THIRD PHASE.
2 detached		+.0013	+ .0011	+. 0012
3 detached		-.0019	-.0046	-.00325