323
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".76; exterior diameter, 10".44. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.8936 5.6470 9.6596 10.2943	Inches. 4.9001 5.6500 9.6589 10.2819	Inches. 4.89685 5.6485 9.65925 10.2881
2				
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches.	Inches.	Inches.
1 detached		4.8975	4.9046	4.90105
2		5.6455	5.6490	5.64725
3 		9.6585	9.6581	9.6583
4 detached		10.2898	10.2838	10.2868
RINGS ALL DETACHED.
2 detached.		5.6499	5.6530	5.65145
3 detached		9.6574	9.6552	9.6563
Breech strains released.
Rings.	Diameters.		
	A	* B	Mean.
	Inch. + .0039 -. 0015 -.0011 -.0045	Inch. + .0045 -.0010 -.0008 + .0019	Inch. + .0042 -.00125 -.00095 -.0013
			
			
			
			
SECOND TO THIRD PHASE.
2 detached		+ .0044	+.0040	+ .0042
3 detached		-.0011	-.0029	-.0020
FIRST TO THIRD PHASE.
2 detached		+ .0029	+ .0030	+ .00295
3 detached		-.0022	-.0037	-.00295