INTERNAL STRAINS IN GUN FORGINGS.	281
Muzzle Slice.
Interior diameter, 4".20; exterior diameter, 8".58. Original diameters of rings in slice.
Diameters.		
A.	B.	Mean.
Inches. 4.3524 5.1348 7.1439 8.1512	Inches. 4.3602 5.1395 7.1440 8.1493	Inches. 4.3563 5.13715 7.14395 8.15025
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.3586 5.1319 7.1413 8.1612	Inches. 4.3639 5.1390 7.1440 8.1369	Inches. 4.36125 5.13545 7.14265 8.14905
			
			
			
			
RINGS ALL DETACHED.
5.1362	5.1425	13935 .־5
7.1417	7.1385	7.1401
2	detached.
3	detached.
Muzzle strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0062 -.0029 -.0026 + .0100	Inch. + .0037 -.0005 .0000 -.0124	Inch. + .00495 -.0017 -.0013 -.0012
			
			
			
			
SECOND TO THIRD PHASE.
+ .0043	+ .0035	+ .0039
+ .0004	-.0055	-.00255
2	detached
3	detached .
FIRST TO THIRD PHASE.
+ .0014	+.0030	+ .0022
-.0022	-.0055	-.00385
2	detached
3	detached
i