339
INTERNAL STRAINS IN GUN FORGINGS, Breech Slice.
Interior diameter, 4".78; exterior diameter, 1041.״. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9494 5.6469 9.6446 10.2652	Inches. 4.9563 5.6523 9.6455 10.2689	Inches. 4.95285 5.6496 9.64505 10.26705
2	 						
3	 				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.		Diameters.	
	A.	B.	Mean.
1	detached	 2		 		Inches.	Inches.	
	4.9540	4.9604	4. 9572
3	 				
4 detached		10.2667	10.2705	10.2686
RINGS ALL DETACHED.
2 detached		5.6498 9.6374		
3 detached				
			
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
1 detached		Inch. + .0046 -.0010 -.0008 + .0015	Inch. + .0041 -.0010 -.0006 + .0016	Inch. + .00435 -.0010 -.0007 + .00155
2 in slice				
3 in slice				
4 detached				
			
SECOND TO THIRD PHASE.
2 detached		+.0039 -.0064		
3 detached			-.0003	
			
FIRST TO THIRD PHASE.
	+.0029 -.0072		
			
			.00405