293
INTERNAL STRAINS IN GUN FORGINGS.
Breech Slice.
Interior diameter, I". 74; exterior diameter, 10".41. Original diameters of rings in the slice.
Diameters.		
A.	B.	Mean.
Inches.	Inches.	Inches.
4.8992	4.8921	4.89565
5.6632	5.6605	5.66185
9.6585	9.6594	9.65895
10.2748	10.2753	10.27505
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.9034 5.6617 9.6575 10.2800	Inches. 4.8978 5.6597 9.6584 10.2689	Inches. 4.9006 5.6607 9.65795 10.27445
2				
3				
			
			
RINGS ALL DETACHED.
2 detached		5.6660 !	5.6635	5.66475
3 detached		9.6501 ;	9.6582	9.65415
Breech strains released
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. +.0042 -.0015 -.0010 + .0052	Inch. +.0057 -.0008 -.0010 -. 0064	Inch. + .00495 -.00115 -.0010 -.0006
2 in slice				
3 in slice				
			
			
SECOND TO THIRD PHASE.
2 detached		+ .0043	+.0038	+ .00405
3 detached		-.0074	-.0002	-.0038
FIRST TO THIRD PHASE.
+ .0028	+ .0030	+ .0029
-.0084	-.0012	-.0048
2	detached .
3	detached .