291
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, !".80; exterior diameter, 10".42. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		 		Inches. 4.9642 5.6568 9.6501 10.2678	Inches. 4.9649 5.6596 9.6559 10.2614	Inches, 4.96455 5.6582 9.6530 10.2646
2				
3				
4				
			
Bings 1 and 4 detached; rings 2 and 3 in the slice.
Diameters.		
A.	B.	Mean.
Inches. 4.9678 5.6561 9.6501 10.2524	Inches. 4.9677 5.6588 9.6552 10.2765	Inches. 4.96775 5.65745 9.65265 10.26445
Rings.
1	detached
2	.......
3	.......
4	detached
RINGS ALL DETACHED.
5.6592	5.6622	5.6607
9.6453	9.6544	9.64985
2	detached.
3	detached.
Breech strains released.
Diameters.
A.	B.	Mean.
Inch. +.0036 -.0007 .0000 -.0154	Inch. + .0028 -.0008 -.0007 + .0151	Inch. +.0032 -.00075 -.00035 -.00015
Rings.
1	detached
2	in slice ..
3	in slice ..
4	detached
SECOND TO THIRD PHASE.
2 detached			+.0031	+.0034	00325 .־4
3 detached		-.0048	-.0008	-.0028
FIRST TO THIRD PHASE.
2 detached	 				+ .0024	+ .0026	+.0025
3 detached					-.0048	-.0015	-.00315