INTERNAL STRAINS IN GUN FORGINGS.	248
Muzzle Slice.
Interior diameter, 4".23; exterior diameter, 8".63. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.3845 5.1539 7.1427 8.4095	Inches. 4.3847 5.1539 7.1399 8.3894	Inches. 4.3846 5.1539 7.1413 8.39945
2				
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A. Inches. 4.3911 5.1535 7.1425 8.3943	B.	Mean.
1 detached			Inches. 4.3905 5.1529 7.1390 8.4015	Inches. 4.3908 5.1532 7.14075 8.3979
2				
3				
4 detached				
			
RINGS ALL DETACHED.
2 detached		5.1559	5.1548	5.15535
3 detached		7.1390	7.1379	7.13845
Muzzle strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0066 -.0004 — .0002 -.0152	Inch. +.0058 -.0010 -.0009 +.0121	Inch. + .0062 -.0007 -.00055 -.00155
2 in slice				
3 in slice				
4 detached				
,			
SECOND TO THIRD PHASE.
+.0024	+ .0019	+.00215
-.0035	-.0011	-.0023
2	detached .
3	detached .
FIRST TO THIRD PHASE.
+ .0020 •	+ .0009	+ .00145
-.0037	-.0020	-.00285
2	detached .
3	detached .