MARROW. 253 



It is well known that many fish instead of bones have carti- 

 lages. The cartilaginous dorsal vertebra of the Squalus cornubi- 

 ensis was analyzed by Marchand,* who obtained from it 

 Animal combustible matter, . 5 7 '07 

 Phosphate of lime, . 32-46 



Sulphate of lime, . 1-87 



Carbonate of lime, . 2 '5 7 



Fluoride of calcium, trace . 

 Sulphate of soda, . 0-80 



Chloride of sodium, . 3*00 



Phosphate of magnesia, . 1 -03 

 Silica, alumina, and loss, . 1-20 



100-00 

 The flat cartilages of the skate gave him, 



Animal combustible matter, . 78*46 

 Carbonate of lime, . 2-61 



Phosphate of lime, . 14-20 



Sulphate of lime, . 0-83 



Fluoride of calcium, trace 

 Chloride of sodium, , 2-46 



Sulphate of soda, . 0-70 



Phosphate of magnesia and loss, 0-74 



100-00 



The translucent cartilages consisted almost entirely of animal 

 matter, as had been previously shown by Chevreul. 



CHAPTER IV. 



OF MARROW. 



THE hollows of the long bones are, in living animals, filled with 

 a peculiar species of fat matter, to which the name of marrow has 

 been given. In some bones this matter is a good deal mixed 

 with blood, and has a red colour ; in others, as the thigh bones, 



* Poggendorfs Annalen, xxxviii. 354. 



