In 1925, the "Meat Ration" was augmented with canned pork and beans ostensibly replacing the canned corned beef and jerky (older rations continued to be issued, however).
In 1925, the "Meat Ration" was changed, deleting the dried beef in favor of canned pork and beans, and reducing the bread component. The corned beef allowance was changed to just three ounces (older rations continued to be issued, however).