CHRISTIANIA VIDENSK.-SELSK. FORHANDL. 1 8 8 3. No. II 15 



tous les Mnscles, qui y ont part; sans encore parler de TOmoplate 

 qu'il faut aussi tenir ferme pendant cette action. 



10. * Weitbrecht, 

 Syndesmologie 1 742. 



11. * B. S. Albin i 



explicalio tabularum anatomicarum Barlholomaei Eustachii. Leidae 

 Batavoriun 1744. 



12. E Alexander Mon ro. 



The anatomi/ of the human hones and nerves. Edinburgh 1750. 

 P. 268. 



This Bone is also joined to the Ulna by a double Enarthrosis, 

 the Radius being received above. and the Ulna below; which. 

 conjunctly considered, form the third Species of Ginglimus: But 

 then the Motion performed in these two is very different; for at 

 the upper End. the Radius does no more than turn round its Axis; 

 while at the lower. it moves in a sort of Cycloid, upon the round 

 End of the Ulna; and as the Hand is articulated and firmly con- 

 nected here with the Radius, the must move together. \Vhen the 

 Palm is turned uppermost. the Radius is said to perform the Supi- 

 nation; when the Back of the Hand is above, it is said to be 

 Prone. But then the Quickness and large Extent of these two 

 Motions are assisted by the Ulna, which, as was before observed, 

 can move with a kind of small Rotation on the sloping Sides of 

 the Pully. This lateral Motion, though very inconsiderable in the 

 Joint itself, is conspicuous at the lower End of such a long Bone; 

 and the strong Ligament connecting this lower End to the Carpus. 

 makes the Hand more readily to obey these Motions. When we 

 design a large circular Turn of our Hand. we increase it by the 

 Rotation of the Os hunieri. and sometimes employ the Spine and 

 inferior Extremities. to make these Motions of Pronation and Supi- 

 nation of the Hand large enough. 



13. * B. S. Alb i ni 



Academicarum annotationum libri sep/em. Leidae 17~>4 — 1766. 



