vi EDITOR'S PREFACE. 



been kept in view, because it is useful and pleasing, in a 

 work of this nature, to mark the footsteps of science and the 

 names of its cultivators. 



For most generous and valuable aid in the course of his 

 labours, the Editor has now the grateful duty of returning his 

 best thanks to his friend Dr. Davy, whose elaborate Researches 

 have so much advanced our knowledge of the blood, 



The Editor's Notes are placed beneath lines and referred 

 to the Text by numbers within parentheses. 



