28 



1 6. Porcelain Mill for Grinding Clay and other Soft- 



Minerals. Exhibited by Dr. H. Ries. 



17. Suite of Specimens Showing Shrinkage of Clay at 



Different Temperatures. Exhibited by Dr. H. Ries. 



18. AUDIMETER for THE MEASUREMENT OF THE SENSITIVE- 



NESS OF THE Ear. Exhibited by Prof. Alfred G. Comp- 

 ton, Department Applied Mathematics, College of the 

 City of New York. 



19. Calorimeter for Liquids. Exhibited by R. L. Litch, 



Princeton University. 



20. Waterman Calorimeter. Exhibited by Prof. F. A. 



Waterman, Smith College. 



21. Special Electrical Apparatus. Exhibited by J. E. 



Moore, Princeton University. 



22. Photographs Showing the Penetrability, the Path 



AND THE Refraction of Roentgen's Rays, by A. 

 Bourgougnon. 



N 

 PHYSIOGRAPHY. 



In Charge of Robert H. Cornish. 



1 . A Series of Three Models of Typical Land Forms, de 



signed and modeled by Prof. W. M. Davis and G. C. 

 Curtis, and exhibited by the Harvard Geographical 

 Laboratory. 



2. A Model Showing Sea Coast Characteristics. Exhib- 



ited by the designer, G. C. Curtis. 



3. Model of the State of New York. Executed under the 



direction of the New York State Museum, and exhibited 

 by the same, through Dr. F. J. H. Merrill, Director. 



4. Model OF THE Catskill Mountains. Executed under the 



direction of the New York State Museum, and exhibited 

 by the same, through Dr. F. J. H. Merrill, Director. 



5. Model of New York Island, Showing Topography in 



1776. Exhibited by the New^ York State Museum, 

 through Dr. F. J. H. Merrill, Director. 



