315
INTERNAL STRAINS IN GUN FORGINGS
Breech Slice.
Interior diameter, 4".75; exterior diameter, 10".45. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9081 5.6501 9.6478 10.2948	Inches. 4.9119 5.6570 9. 6498 10.3016	Inches. 4.9100 5.65355 9.6488 10.2982
2 				
3				
4 				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
		Diameters.	
Rings.						—
	A.	B.	Mean.
	1 Inches.	Inches.	Inches.
1 detached			 4.9116	4.9186	4. 9151
2			I 5.6485	5.6561	5.6523
3			 9.6465	9.6490	9.64775
4 detached			! 10.3065	10.2868	10.29665
RINGS ALL DETACHED.
	5.6516	5.6584	5.6550
	9.6469	9.6426	9.64475
			
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch.	Inch.	Inch.
1 detached		+ .0035	+ .0067	+ .0051
	-.0016	-.0009	-.00125
	-.0013	-.0008	-.00105
4 detached		+ .0117	-.0148	-.00155
SECOND TO THIRD PHASE.
2 detached		+.0031	+ .0023	+.0027
3 detached				+.0004	-.0064	-.0030
FIRST TO THIRD PHASE.
2 detached		+ .0015	+ .0014	+ .00145
3 detached		-.0009	-.0072	-.00405