ANIMAL MECHANICS 



ON THE CANCELLATED STRUCTURE OF SOME OF 

 THE BONES OF THE HUMAN BODY 



OR 



OF THOSE BONES WHICH HAVE A DEFINITE 



RELATION TO THE ERECT POSITION 



WHICH IS NATURALLY ASSUMED 



BY MAN ALONE 



BY 



JEFFRIES WYMAN, A. M., M. D. H. C. 



COMMUNICATED TO THE BOSTON SOCIETY OF NATURAL HISTORY 



November 7, 1849 



