404 Transactions of the Canadian Institute [vol. ix 



10. The amount of potassium in the kidney of the dog and even of 

 the frog exceeds that of the sodium, and in the dog it exceeds greatly 

 the amount of potassium in the blood or plasma. 



I desire to acknowledge the kind criticism and advice which I received 

 during the progress of this work from Professor Macallum, at whose 

 suggestion and under whose guidance it was carried out. 



