Of late it seems as though a few definite conclusions may have been reached as to the growth of bone. Gallie and Robertson,1 Hey-Groves 2 and others have presented the results of many years of research in scores of laboratories and have outlined the theories deduced in admirably clear papers. Opinions as to the proper way of performing a bone grafting operation still seem, however, to be diametrically opposed. In this country we are led by Albee's energetic advocacy of the massive transplant. The French, as far as I can judge, follow Delagenière's method of thin, periosteo-osteal flaps. The English, if I interpret Sir Robert Jones' expressions of opinion correctly, regard the bone graft with considerable distrust and put their faith in shortening and suturing ununited fractures. In order, then, to arrive at an estimate of the value of bone grafts, and at a conclusion regarding the proper method