EXPERIMENTAL EQUIPMENT AND PROCEDURES 25 



Twitty, V. C, 1937 - "Experimenta on the phenomenon of paralysis produced ty a toxin 

 occurring in Tri turns embryos." Jour. Exp. Zool. 76:67. 



Tyler, A. & W. E. Berg, I9I+I - "A new type of micro-respiraometer. " Sc. 9it-:576. 



Vagtendonk, W. J. van., F. A. Puhrman, E. L. Tatum, & J. Field, 19^+2 - "Triturus toxin: 



Chemical nature and effects on tissue respiration glycolysis." Biol. Bull. 85:157- 



Weiss, P. , 1956 - "A convenient retractor for use in operations and dissections of small- 

 sized animals." Sc. 8'+:l61+. 



Williams, T. W., I9I+I - "Alizarin Red S and Toluidine Blue for differentiating adult or 

 embryonic bone and cartilage." Stain Tech. l6:25. 



"H/ien it is recalled that the 9,200.000.000 cells m 

 the human cerebral cortex are the nervous e lements of this 

 organ and that they collectively constitute rather less 

 than a cubic inch of protoplasm, it seems almost incred- 

 ible that they should serve us as they do. They are the 

 materials whose activities represent all human states, sen- 

 sations, memories, volitions, emotions, affections, the 

 highest flights of poetry, the most profound thought s of 

 philosophy , the most far-reaching theories of science, and, 

 when their action soes astray, the ravings of insani ty . It 

 is this small amount of protoplasm in each of us that our 

 whole educational system is concerned with training and 

 that serves us through a lifetime in the growth of personal- 

 ity " 

 ^ - G. II. Parker 



