333
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".76; exterior diameter, 10".41 Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9024 5.6507 9.6518 10.2865	Inches. 4.9051 5.6480 9.6517 10.2733	Inches. 4.90375 5.64935 9.65175 10.2799
2				
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1 detached		Inches. 4.9074 5.6493 9.6510 10.2933	Inches. 4.9097 5.6469 9.6511 10.2587	Inches. 4.90855 5.6481 9.65105 10.2760
2				
3				
4 detached				
			
RINCS ALL DETACHED.
2 detached		5.6533	5.6509	5.6521
3 detached		9.6492	9.6463	9.64775
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. +.0050 -.0014 -.0008 + .0068	Inch. +.0046 -.0011 -.0006 -.0146	Inch. + .0048 -.00125 -.0007 -.0039
			
			
			
			
SECOND TO THIRD PHASE.
2 detached		+ .0040	+.0040	+. 0040
3 detached		-.0018	-.0048	-.0033
FIRST TO THIRD PHASE.
2 detached		+ .0026	+.0029	+.00275
3 detached		-.0026	-.0054	-.0040