221
INTERNAL STRAINS IN GUN FORGINGS, Breech Slice.
Interior diameter, 4".74; exterior diameter, 10".36. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches.	Inches.	Inches. 4.90915 5.6495
			
			
		9.6365	9.6404
			
Bings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.		Diameters.	
	A.	B.	Mean.
1 detached		Inches.	Inches.	Inches. 4.9164 5.6478 9.63925 10.20695
			
			
		9.6352	
			
RINGS ALL DETACHED.
2 detached				5.65325 9. 63505
3 detached				
		9.632o	
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
1 detached		Inch. + .0061 -.0014 -.0010 +.0023	Inch. + .0084 -.0020 -.0013 -.0016	Ä Inch. w +.00725 -.0017 -.00115 + .00035
2 in slice	 < 				
3 in slice				
4 detached				
			
SECOND TO THIRD PHASE.
2 detached				+ .00545 -.0042
3 detached				
						
FIRST TO THIRD PHASE.
2 detached				+.00375 -.00535
3 detached			+. 0041