28 GERDY ON THE INTIMATE STRUCTURE OF BONE. 



Fig. 3.* 



to capillary minuteness in the periosteum. The diameter of 

 these little vessels, where they enter the bone, has been calcu- 

 lated to be about one-twentieth part of a line. The drops of 

 blood which collect when the periosteum is stripped from the 



* Fig. 3. Vertical section of the os femoris. 1. 1. Tubular cells perpendicular 

 to the articular surface of the bone ; sometimes these cells are chiefly round. 



2. Cartilaginous lamin separating the epiphysis from the shaft of the bone. 



3. Vertical canal opening by one or more foramina, in the fossa at the top of the 

 trochanter, and anastomosing with the canals of the canaliculated tissue. It 

 lodges one of the vessels of the cellular tissue ; which penetrate by the extremity 

 of the body of the long bone. 4. 4. Vascular canaliculi, which run obliquely 

 upwards and inwards towards the lamen of the epiphysis, where the cartilage 

 begins to be removed, and the consolidation of the epiphysis and shaft has com- 

 menced. 5. 5. Canaliculi of the upper part of the body of the bone, which are 

 directed towards the axis of the bone, and which anastomose with the vascular 

 canal indicated at 3. 6. Conical termination of the reticulated tissue of the 

 medullary canal. p. 



