837
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".74; exterior diameter, 10".41. Original diameters of rings in the slice.
Rings	Diameters.		
	A.	B.	Mean.
1		Inches. 4.8955	Inches. 4.8953 5.6464	Inches. 4.8954 5.6465
2		5.6466		
3		9.6508	9.6454	9.6481
4		10.2605	10.2545	10.2575
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8988 5.6459 9.6505 10.2586	Inches. 4.8986 5.6455 9.6449 10.2558	Inches. 4.8987 5.6457 9.6477 10.2572
2				
3				
			
			
RINGS ALL DETACHED.
5.6487	5.6485	5.6486
9.6470	9.6460	9.6465
2	detached.
3	detached.
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0033 -.0007 -.oooa -.0019	Inch. +.0033 -.0009 -.0005 +.0013	Inch. +.0033 -.0008 -.0004 -.0003
			
3 in slice					
			
			
SECOND TO THIRD PHASE.
2 detached		+ .0028	+.0030 +.0029
3 detaehed		-.0035	+.0011 -.0012
FIRST TO THIRD PHASE.
2 detached		+ .0021	+ .0021	+ .0021
3 detached		-.0038	+.0006	-.0016
H. Doc. 508----22