INTERNAL STRAINS IN GUN FORGINGS.	231
Breech Slice.
Interior diameter, 4".73; exterior diameter, 10".43. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8780 5.6474 9.6484 10.2776	Inches. 4.8787 5.6532 9.6490 10.2808	Inches. 4.87835 5.6503 9.6487 10.2792
			
			
			
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8829 5.6462 9.6476 10.2862	Inches. 4.8820 5.6527 9.6488 10.2741	Inches. 4.88245 5.64945 9.6482 10.28015
			
			
			
			
KINGS ALL DETACHED.
	5.6504	5.6566	5.6535
3 detached		9.6458	9.6463	9.64605
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0049 -.0012 -.0008 +.0086	Inch. + .0033 -.0005 -.0002 -.0067	Inch. + .0041 -.00085 -. 0005 +.00095
			
			
			
			
SECOND TO THIRD PHASE.
	+.0042	+.0039	+ .00405
3 detached		-.0018	-.0025	— .00215
FIRST TO THIRD PHASE.
	+.0030	+.0034	+ .0032
3 detached	-		-.0026	-.0027	—.00265