6 NOTE. 



be appointed to supervise the entire affair, and thus insure its 

 thoroughly scientific character. 



In March, 1884, the following Commission was appointed for 

 the above purpose : 



William Pepper, M.D., LL.D. 



Joseph Leidy, M.D., LL.D., Professor of Anatomy. 



George F. Barker, M.D., Professor of Physics. 



Rush Shippen Huidekoper, M.D., Professor of Veterinary 

 Anatomy and Pathology. 



William D. Marks, Whitney Professor of Dynamical Engi- 

 neering. 



Lewis M. Haupt, Professor of Civil Engineering. 



Thomas C. Eakins, of the Academy of Fine Arts. 



Edward H. Coates, Chairman of the Instruction Committee at 

 Academy of Fine Arts, Chairman. 



Harrison Allen, M.D., Emeritus Professor of Physiology, 

 Secretary, 



The investigation proved even more prolonged and costly than 

 had been anticipated, and more than three years elapsed and nearly 

 thirty thousand dollars were expended before its completion. 



The result has, however, fully justified the action of the Uni- 

 versity, as well as the expenditure of time and money; the work 

 will undoubtedly be of lasting service to art and science. 



Special mention should be made of the valuable assistance ren- 

 dered by the authorities of the Zoological Gardens, and particularly 

 by Mr. Arthur E. Brown, the superintendent, who extended every 

 facility to Mr. Muybridge in photographing many typical animals 

 in their splendid collection. It is due to Dr. F. X. Dercum that 

 acknowledgment should be made here of the great amount of time 

 and labor devoted by him to furthering the success of this inves- 

 tigation. 



The mass of novel material presented in this work is so great 

 that it has not as yet been possible to subject any considerable 



