e GEORGE V SESSIONAL PAPER No. 38a A, 1916 



XVII. 



THE WATER AND IODINE CONTENTS OF SOME PACIFIC COAST 



KELPS. 



By a. T. Cameron, M.A., B.Sc. 



Assistant Professor of Physiology and Physiological Chemistry, University of 



Manitoba. 



In a previous communication* I have dealt with the iodine content of a large 

 number of marine species, both animal and vegetable, obtained near the Biological 

 Station at Departure Bay, B.C., during the summer of 1914, vphile carrying out other 

 work at the Station, I collected a considerable amount of kelp material, and this, with 

 some rock-weed, has been subsequently analyzed in the Physiological Chemical Labora- 

 tory of the University of Manitoba. The results of these analyses follow. In all cases 

 the material was allowed to drain for an hour before weighing. For the earlier weigh- 

 ings (May) an exact balance was not available, as is shown by the figures. The some- 

 what sticky surface of most of the Laminariaceae' prevents adherence of much sea- 

 water, so that error from this source is very slight. The material was either at once 

 heated to constant weight at 100° C, or preserved in absolute alcohol and subsequently 

 so heated. Kendall's^ method of iodine analysis was used. The material was obtained 

 in Departure Bay, unless otherwise stated. Similar samples of those specimens 

 marked with an asterisk were sent to Dr. F. T. Shutt for analysis of other constituents, 



1 Cameron, Contributio7is to .Canadian Biology, Fasciculus I, 1911-1914, pp. 51-68, 

 (Ottawa), 1915. 



2 Kendall, Journ. Biol. Chem., XIX, p. 251, 1914. 



