299
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4".81; exterior diameter, 10".44. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.9587 5.6657 9.6562 10.2928	Inches. 4.9677 5.6630 9.6453 10.2980	Inches. 4.9632 5.66435 9.65075 10.2954
			
			
			
			
Rings !.and 4 detached; rings 2 and 3 in the slice.
Diameters.
Rings.	A.	B.	Mean.
	Inches. 4.9623 5.6650 9.6558 10.2880	Inches. 4.9718 5.6623 9.6451 10.2945	Inches. 4.96705 5.66365 9.65045 10.29125
			
			
			
			
RINGS ALL DETACHED.
					! 5.6666	5.6640	5.6653
					I 9.6528.	9.6425	9.64765
						
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0036 -.0007 -.0004 -.0048	Inch. +.0041 -.0007 -.0002 -.0035	Inch. +.00385 -.0007 -.0003 • -.00415
			
			
			
			
SECOND TO THIRD PHASE.
+.0016	+ .0017	+ .00165
-.0030	-.0026	-.0028
2	detached...................................
3	detached........................................;	— •W30
FIRST TO THIRD PHASE.
		I	+ .0009	+ .0010	+ .00095
3 detached				-.0034	-.0028 |	-.0031