Structure of Bone. 19 



by steeping in acid. The animal matter, which alone remains 

 in the steeped portion, is so flexible that this part of the bone 

 has been easily tied in a knot. B. C. 1. N. 7. 



2. 4. Cancellous and Compact Tissue. — A small section of a 



bone — macerated and dried — to show the compact shell and 

 cancelli in the interior. B. C. 1. IST. 9. 



2. 5. Cancellous Tissue. — A section of the lower end of 

 the tibia — macerated and in spirit — to show the arrangement of 

 the cancelli. ^\. C. F. 107. 



2. 6. Arrangement of Cancellous Plates in the Head 

 and Neck of Femur and Os Innominatum. — Section of 



the upper part of the femur and os innominatum — macerated 

 and dried — to show the cancelli. 



It will be seen that at the upper end the lamellae form 

 the figure of a Gothic arch, and that they radiate from 

 the head towards the great trochanter on the one hand and 

 towards the under surface of the neck on the other. 



W. C. F. 9. 



2. 7. Arrang-ement of Cancelli in the Head of a Tibia.— 



Section of a tibia — macerated and dried to show the cancelli. 

 A line of bone running across the section shows the jDoint of 

 union of the epiphysis. W. C. F. 11. 



2. 8. Cancellous and Compact Tissue of Humerus. — 



Vertical section of a right humerus, apparently of an elderly 



person — macerated and dried — to show the internal structure of 



the bone. G. C. 2135. 



Presented hy W. Campbell, F.R.C.S.E. 



