460 EDWARD HORNE CRAIGIE 



6. The interpretation of the functional significance of the 

 anatomical data recorded depends upon the unsolved problems 

 of the fundamental nature of nervous processes and their relation 

 to metabolic activity. The bearing of various theories regarding 

 these upon the present investigation is discussed. 



Special acknowledgments are due to Dr. B. A. Bensley and to 

 Dr. H. H. Donaldson, as well as to other members of the staffs 

 in both the Department of Biology of the University of Toronto 

 and The Wistar Institute. The writer also wishes to express 

 his indebtedness to Dr. J. J. R. Macleod for helpful criticism 

 and to the Director of The Wistar Institute for the privileges 

 which were accorded him in that institution. 



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