TO 



JOHN FLEMING, D.D., 



PROFESSOR OF NATURAL SCIENCE, NEW COLLEGE, EDINBURGH, 

 AND 



GEOEGE JOHNSTON, M.D., LL.D., 



FELLOW OF THE ROYAL COLLEGE OF SURGEONS OF EDINBURGH, 



anjia ^Little U0lutne 

 is 



WITH GBEAT ESTEEM AND AFFECTION 



DEDICATED 

 BY THEIE GEATEFTJL FBIEKD, 



THE AUTHOE. 



