392 Pub. Paget Sound Biol. Sta. Vol. 2, No. 55 



previous experiments. It may be stated that the animals after the cyanide 

 treatment appeared entirely normal in all respects. 



10. Conclusinn. Potassium cyanide was found to cause a marked de- 

 crease in the rate of oxygen consumption of some echinoderms, mollusks, 

 and a crustacean. This result is in agreement with a large body of 

 jirevious work. Potassium cyanide may therefore be used as an agent to 

 depress the respiratory rate of organisms for experimental purposes. 



Citations 

 Hyman, L. H. 



1916. On the action of certain substances on oxygen consumption. 



I. The action of potassium cyanide. Amer. Jour. Physiol., Vol. 

 40, pp. 238-248. 



1919a. On the action of certain substances on oxygen consumption. 



II. Action of potassium cyanide on Planaria. Amer. Jour. 

 Physiol., Vol. 48, pP. 340-371. 



1919b. On the action of certain substances on oxygen consumption. 



III. Action of potassium cyanide on some coelenterates and an- 

 nelids. Biol. Bull., Vol. 37, pp. 404-415. 



