249
INTERNAL STRAINS IN GUN FORGINGS,
Breech Slice.
Interior diameter, 4. "79; exterior diameter,. 10. "42. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.9273 5.6492 9.6432 10.2800	Inches. 4.9250 5.6494 9.6482 10.2771	Inches. 4.92615 5.6493 9.6457 10.27855
2					
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
	Inches. 4.9343 5.6480 9.6425 10.2674	Inches. 4.9298 5.6475 9.6469 10.2849	Inches. 4.93205 5.64775 9.6447 10.27615
2				
3				
			
			
RINGS ALL DETACHED.
2 detached				 5.6514	5.6517	5.65155
3 detached				; 9.6388 |	9.6449	9.64185
Breech strains released.
Rings.	Diameters.		
	A.	B.	Mean.
	Inch. + .0070 -.0012 -.0007 -.0126	Inch. + .0048 -.0019 -.0013 +.0078	Inch. + .0059 -.00155 -.0010 -.0024
			
			
			
			
SECOND TO THIRD PHASE.
2 detached		+ .0034	+.0042	+ .0038
3 detached		-.0037	-.0020	-.00285
FIRST TO THIRD PHASE.
+.00225
-.00385
+ .0023 -.0033
+ .0022 -.0044
2	detached
3	detached