341
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".80; exterior diameter, 10".42. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9504	Inches. 4.9426	Inches. 4.9465
2		5.6446	5.6448	5.6447
3		9.6430	9.6494	9.6462
4		10.2726	10.2685	10.27055
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches.	Inches.	Inches.
1 detached		4.9541	4.9466	4.95035
2		5.6432	5.6437	5.64345
3		9.6422	9.6486	9.6454
4 detached		10.2818	10.2687	10.27525
RINGS ALL DETACHED.
	* 5.6474	5.6475	5.64745
	9.6430	9.6454	9.6442
			
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0037 -.0014 -.0008 +.0092	Inch. + .0040 -.0011 -.0008 +.0002	Inch. + .00385 -.00125 -.0008 + .0047
			
			
			
			
SECOND TO THIRD PHASE.
2 detached 		+.0012	+.0038	+ .0040
3 detached		+.0008	-.0032	-.0012
FIRST TO THIRD PHASE.
	+.0028	+ .0027	+ .00275
	.0000	-.0040	-.0020
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