656 INDEX. Internal strains in gnn forgings: Page. Remarks______________________________________________________ 219 5-inch. R. F. gun tubes— Tabulation----------------------------------------------- 219 No. 11249 B2, discard !-inch— Breech................................................ 220 Muzzle_________________________________________________ 222 No. 11272 B3— Muzzle crop end after second annealing at 360° F----- 224 No. 11272 B3 BM— Breech________________________________________________ 226 Breech, annealed at 450° F.............................. 228 No. 11272 B3 BO— Breech, annealed at 600° F________________________________ 230 No. 11363 Bl, discard f-inch— Breech _ _ ____________________________________________ 232 Muzzle----------------------------------------------- 234 No. 11363 Bl— Breech.............................................- - - 236 Muzzle________________________________________________ 238 No. 11363 B2, discard f-inch— Breech______________________________..........- -.... 240 Muzzle------------------------------------------------- 242 No. 11363 B3, discard !-inch— Breech_______________________________________________ 244 Muzzle----------------------------------------------- 246 No. 11363 B3— Breech................................................ 248 Muzzle.---------------------------------------------- 250 No. 11467 Bl, discard f-inch— Breech______________________________- - - ----------- 252 Muzzle_____________________________________________, - - 254 No. 11775 B2, discard f-inch— Breech________________________________________________ 256 Muzzle___________________________________________________ 258 No. 11775 B2, 4 diameters— Breech___________________________.•------------------ 260 Muzzle________________________________________v,...... 264 No. 11775 B4 MM— Muzzle___________________________________________________ 268 No. 11775 B4 MO— Muzzle__________________________________________________ 370 No. 11775 B4 MI— Muzzle--------------------------------------------------- 272 No. 11784 Bl— Breech____________________________________________________ 274 Muzzle------------------------------------------------- 276 Breech, after annealing at 665° F ________________________ 278 Muzzle____________________________________________________ 280 Breech_________________________________________________ 282 Muzzle____________________________________________________ 284 Breech--------------------------------------------------- 286 Muzzle____________________________________________________ 288 Breech, after annealing at 650° F------------------------- 290 No. 11784 B3 BM— Breech________—....................................... 292 No. 11784 B3 BO A— Breech, annealed at 600° F------------------------------- 294 No. 11784 B3 BM A— Breech, annealed at 750° F-------------------------------- 296 :No. 11791 Bl, discard f-inch— Breech__________________- -.........*---------------- 298 Muzzle -- 300 No. 11791 Bl— Breech____________________________________________________ 302 Muzzle------------------------------------------------- 304