PREFACE 



to the original researcher, a larger field for 

 the further study of the most important of the 

 senses the eyesight. 



Most of the dissections explained in the fol- 

 lowing pages are original; some, however, are 

 only revisions of old methods. 



This opportunity is taken to acknowledge 

 the many helpful suggestions that were made 

 by Dr. Ivin Sickels, of the College of the City 

 of New York, and by the late Dr. Edward C. 

 Spitzka, of New York. Thanks are due Mr. 

 E. F. Howes, of Messrs. Swift & Co., for fur- 

 nishing the necessary supply of beef eyes; 

 to Messrs. Lee & Beach, photographers, of 

 New York, for their painstaking efforts in pro- 

 ducing good photographs of the actual dissec- 

 tions; and to Schlueter Printing Company, of 

 New York, for their many courtesies and in- 

 terest in the production of the book. 



FREDEKIC A. WOLL. 

 New York, July 21, 1914. 



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