HINGE JOINT — HINGES 



The Patella, or knee-cap, is at the front of the stifles where 



the Femur and Tibia join, the Fibula being a bone which 



projects upwards at the back of the 



top of the Tibia, and corresponds 



with the Ulna of the fore-legs. The 



Tibia in turn unites with the hock at 



the Astragalus, the chief bone of the 



hock, at the back of which is a bone 



projecting upwards which is known 



as the Os Calcis, or point of the hock, 



the minor bones of the hock being 



situated between the Astragalus and 



Os Calcis, (i) Tibia; (2) Os Calcis, 



or point of hock ; (3) Astragalus ; 



(4) Cuboid ; (5) Cunieform magnum ; 



(6) Cunieform parvum ; (7) Cunieform 



medium ; (8) Small Metatarsal or 



Splint bone ; (9) Large Metatarsal or 



Cannon bone; (10) Sesamoid bone; 



(11) Suffraginis or Long Pastern bone ; 



(12) Os Coronse or Small Pastern 

 bone; (13) Os Pedis or Coffin bone ; 

 (14) Navicular bone. 



Bones of Hind-legs. 



Hinge Joint — A joint in which the protuberances of one 

 bone fit into grooves in another, in such a manner that the 

 joint can only be moved backwards and forwards, as in the 

 knee, and not in any other direction. (See Ball and Socket 

 Joint, Joints.) 



Hinges. — The hinges on all stable doors are best long 

 so as to strengthen the woodwork, but under any circum- 

 stances they should be free from any projections which 

 might cause injury to the horse. A periodical inspection 

 of them is therefore necessary, in order that any loose 

 screws or pieces of metal may be detected. (See Stables.) 



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