CHAP. I.] BY THE COFFIN BONE. 447 



Coleman and White, who are the authors alluded 

 to at page 442, have persisted in terming this juicy 

 elastic substance " fatty," and fatty frog, at that 

 part which is next above (ff ) in our section ; 

 whereas, at this place the substance is farther re- 

 moved from a resemblance to fat or juice than at 

 any other of the parts just described. Although 

 an evident process of the same secretion which 

 ascends in its more fluid state to the coronet, it is 

 here, at the frog, scarcely found gelatinous when 

 submitted to solution. At a public veterinary 

 meeting, April 9, 1828, Dr. Pearson, one pf the 

 examiners of candidates, threw his fatty theory in 

 the face of professor Coleman y declaring that lie 

 could not, upon careful analysis, discover an atom 

 of fat in its whole composition. The pupils present 

 marvelled exceedingly at this announcement, though 

 we had disabused the public mind on this mistaken 

 notion five years before that day. 



The navicala, or shuttle-bone (//), as it has been 

 called, moves in the midst of much elastic substance, 

 resting upon and pressing the back sinew flat upon 

 the strongest part of that substance, above the 

 centre of the frog. This little bone, it will be seen, 

 is well adapted, by its shape, to traverse the lower 

 surface of the small pastern (i), and .the lateral 

 edge of the coffin-bone (a), whenever the back 

 sinew (ft) is drawn up to lift the foot, as it does, 

 from off the ground, always returning into its place 

 as the foot comes down again. At / is the toe, 

 m is the heel of the foot, and at n is the near 



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