Uniform Or Almost Uniform With The Normal Bone, are:

(a.) Bone developed in permanent cartilages, and especially in those of the larynx, sometimes and in part also the ossifications of costal cartilages. In them, however, we usually miss the lamellated structure of normal bone.

(6.) Bone-structures which form as callus for the reunion of fractured, and for the regeneration of lost bone, hyperostosis, whether external or internal (sclerosis), exostoses, and all osteophytes, including such as in the shape of thorny, stellate, or scaly bone-growths and fabrics, enter into, and sometimes greatly surpass in volume, certain concurrent new growths, especially such as occur in bone.

Notwithstanding the all but identical relations of the texture of these formations with that of normal bone, they present not a few important discrepancies, cognizable both by a general comparison with normal bones, and by a special comparison with those directly implicated. Thus, as examples, we may adduce the inferior vascularization, inferior number of medullary canals, less marked lamellated structure, anomalous amount and irregular disposition of the bone-corpuscles, in the new bone-growths.

As regards the process of ossification in the several blastemata, that produced by inflammation is the best adapted for investigation, as being at once the most frequent, and the most voluminous. The flaky or fibrous basis of the exudate furnishes the fundamental (intercellular) substance of the cartilage. Within this cells become developed, which, following the process of physiological bone-formation, change into bone-corpuscles.

(c.) The slowly developed bone-nuclei in callus, arrested at the stage of a ligamentous formation in bone-fractures, trephine-gaps, etc.

(d.) Osseous growths developed beyond contact with bone on the dura mater, as also upon the cerebral arachnoid, and upon the free visceral plate of the spinal arachnoid membrane; the so-called ossifications upon the intermuscular ligaments in the vicinity of hyperostosed articulations, and of the membrana obturatoria of the pelvic foramen ovale. The ossifications occurring in tendons are said by Henle to be of true bone-texture, as are also, in fine, the bony concrements found impacted within healthy muscular textures.