Bison which were nursing serious wounds most often have gone many days at a time without either food or water, and in this connection it may be mentioned that the recuperative power of a bison is really wonderful. Judging from the number of old leg wounds, fully healed, which I have found in freshly killed bisons, one may be tempted to believe that a bison never died of a broken leg. One large bull which I skeletonized had had his humerus shot squarely in two, but it had united again more firmly than ever. Another large bull had the head of his left femur and the hip socket shattered completely to pieces by a big ball, but he had entirely recovered from it, and was as lusty a runner as any bull we chased. We found that while a broken leg was a misfortune to a buffalo, it always took something more serious than that to stop him. VI. THE FOOD OF THE BISON. It is obviously impossible to enumerate all the grasses which served the bison as food on his native heath without presenting a complete list of all the plants of that order found in a given region; but it is at least desirable to know which of the grasses of the great pasture region were his favorite and most common food. It was the nutritious character and marvelous abundance of his food supply which enabled the bison to exist in such absolutely countless numbers as characterized his occupancy of the great plains. The following list comprises the grasses which were the bison's principal food, named in the order of their importance: