PREFACE xix 



containing an account <>t" 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 1 am correct in saying that, judging 



from the outline, my statements will agree with 

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

 more accurately seen when the Proceedings of the 

 Royal Society o\' Edinburgh are published. 



1'iKi.i.UAVi: S v i .\i:i . 



April, 1843. 



