RESEARCH LABORATORY OF THE ROYAL COLLEGE OF 



PHYSICIANS OF EDINBURGH, 



January, 1898. 



To THE SCOTTISH FISHERY BOARD. 

 GENTLEMEN. 



I have the honour to present the following- Report 

 of the Investigations on the Life-History of the Salmon in Fresh 

 Water, which have been carried 011 in the Research Laboratory of 

 the Royal College of Physicians of Edinburgh. 



In doing so, I desire to state that the valuable plan of procuring 

 salmon simultaneously from the mouths and from the upper reaches 

 of the rivers for the investigation of the migrations of the fish and 

 the elucidation of the question of whether fish leaving the sea early 

 in the year remain in the upper waters until the breeding season, 

 is due to Mr. Walter E. Archer. Inspector of Salmon Fisheries for 

 Scotland. 



On behalf of my fellow-workers and myself, I take this oppoi'- 

 tunity of thanking him for much valuable advice and assistance 

 during the prosecution of the work. 



I have the honour to be, Gentlemen, 



Your obedient Servant, 



D. NOEL PATON, 



Superintendent of the Laboratory of the Royal 

 College of Physicians of Edinburgh. 



