PREFACE xix 



containing an account of Mr. Young's experiments 

 on the growth of salmon. I have inserted an 

 extract in the Appendix, for the benefit of those 

 who are interested in the subject. 



I hope I am correct in saying that, judging 

 from the outline, my statements will agree with 

 Mr. Young's experiments. This, however, will be 

 more accurately seen when the Proceedings of the 

 Royal Society of Edinburgh are published. 



BELGRAVE SQUARE, 

 April, 1843. 



