INTRODUCTION. XX111 



this incompleteness is to be attributed to thejcon- 

 siderations which have induced the Author to 

 postpone the publication of the second and last 

 volume on the Phenomena of Organic and Ani- 

 mal Life. 



I cannot conclude without making my warm 

 acknowledgements to those Gentlemen who 

 have assisted me in my Experimental Inquiries. 

 I can but feebly express the zeal and ability with 

 which Mr HAMILTON, Surgeon, has on all occa- 

 sions assisted me ; nor must I forget to mention 

 my obligations to A. T. HOLROYD, Esq. Christ 

 Coll. Cambridge, for the attention and talent 

 which he devoted to some of the most important 

 of these experiments. I am also materially in- 

 debted to GEORGE W. CHESTER, Esq. for many 

 advantages which I have derived from his know- 

 ledge of minute anatomy, and of professional 

 subjects. To Mr KEMP, Lecturer on Practical 

 Chemistry, Edinburgh, and to Mr HARDY and 

 Mr MURRAY, Medical Students, I have also to 

 return my thanks for their kind assistance. 



