Acknowledgments 
Many people have contributed to the preparation of this atlas. Miss Martha 
Carmichael and Mr. George Creswell assisted in preparing the histological ma- 
terial and proofread the plates and tables. Dr. Kent D. Morest and Dr. William 
H. Mehler generously consulted with us in regard to the dorsal tegmentum and 
optic thalamus, respectively. Miss Norma Beck typed the manuscript. Mr. 
Le\i Waters was responsible for the care of the animals. 
The photography was done in the Medical Arts and Photography Branch of 
the National Institutes of Health under the supervision of Mr. Roy Perry and 
Mr. Vernon E. Taylor. Mr. Paul Ellis photographed the slides and helped in 
solving problems pertaining to the grid used on the frontal sections. Mr. Ralph 
Fernandes enlarged and developed the prints. 
We wish to express our appreciation to Dr. Wade H. Marshall of the Laboratory 
of Neurophysiology, National Institute of Mental Health, for his help in seeing 
this atlas through to publication. 
Finally, we wish to acknowledge our great indebtedness to the Government 
Printing Office for the special care given to its production. 
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