241
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".74; exterior diameter, 10".45. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.8879 5.0505 9.6548 10.2984	Inches. 4.8930 5.6562 9.6465 10.2902	Inches. 4.89045 5.65335 9.65065 10.2943
2				
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8929 5.6490 9,6539 10.3005	Inches. 4.9012 5.6551 9.6457 10.2830	Inches. 4.89705 ' 5.65205 9.6498 10.29175
2				
3						
			
			
RINGS ALL DETACHED.
2 detached			' 5.6525	5.6585	I 5.6555
3 detached			! 9.6520	9.6421	9.64705
Breech strains released.
Rings.	Diameters,		
	A.	B.	Mean.
	Inch. +.0050 -.0015 -.0009 + .0021	Inch. + .0082 -.0011 -.0008 -.0072	Inch. +.0066 -.0013 -.00085 -.00255
			
			
			
			
SECOND TO THIRD PHASE.
+.0035	+.0034	+.00345
-.0019	-.0036	-.00275
2	detached.
3	detached.
FIRST TO THIRD PHASE.
2 detached		+ .0020	+ .0023	+ .00215
3 detached		-.0028	-.0044	-.0036
H. Doc. 508----16