319
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".77; exterior diameter, 10".41 Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9297 5.6396 9.6374 10.2711	Inches. 4.9145 5.6421 9.6489 10.2645	Inches. 4.9221 5.64085 9.64315 10.2678
2				
3				
4	 				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.9372 5.6380 9.6358 10.2759	Inches. 4. 9224 5.6409 9.6482 10.2543	Inches. 4.9298 5.63945 9.6420 10.2651
2				
3				
			
			
RINGS ALL DETACHED.
2 detached				5.6441	5.6464	5.64525
3 detached		9.6285	9.6439	9. 6362
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0075 — .0016	Inch. +.0079 . 0012	Inch. + .0077 -.0014 -.00115 -.0027
			
3 in slice		-.0016 +.0048	-.0007 -.0102	
			
SECOND TO THIRD PHASE.
2	detached	 3	detached		+.0061 -.0073•	+ .0055 -.0043	+ .0058 -.0058
FIRST TO THIRD PHASE.			
2 detached		+.0045	+.0043	+ .0044
3 detached		-.0089	-.0050	-.00695