347
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".72; exterior diameter, 10".50. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8725 5.6587 9.6534 10.3355	Inches. 4.8709 5.6491 9.6415 10.3291	Inches. 4.8717 5.6539 9.64745 10.3323
			
			
			
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.8801 5.6568 9.6519 10.3450	Inches. 4.8779 5.6478 9.6408 10.3205	Inches. 4.8790 5.6523 9.64635 10.33275
			
			
			
			
RINGS ALL DETACHED.
	5.6620	5.6529	5.65745
	9.6479	9.6358	9.64185
			
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0076 -.0019 -.0015 + .0095	Inch. +.0070 -.0013 -.0007 -.0086	Inch. +.0073 -.0016 -.0011 +.00045
			
			
			
			
SECOND TO THIRD PHASE.
+ .0052	+ .0051	+.00515
-.0040	-.0050	-.0045
2 detached . 8 detached .
FIRST TO THIRD PHASE.
	+ .0033	+ .0038	+.00355
	-.0055	-.0057	-.0056