52 



K 



PHOTOGRAPHY. 



In Charge of William Stratford. 



New Forms of Lenses. Zeiss' Portrait, Rectilinear and 

 Wide Angle. Each element is made of four parts. 

 With photographs made by the lenses. Exhibited by 

 the Bausch & Lomb Optical Co. 



New Form of Lens. Goerz Rectilinear. Each element is 

 made of three kinds of glass. With photographs made 

 by lens. Exhibited by C. P. Goerz. 



Photographic Apparatus. Exhibited by the Scovill & 

 Adams Optical Co. 



Apparatus for Photo-Micrography. Illustrating the 

 method of projecting images of minute objects. Ex- 

 hibited by Henry S. Stearns. 



Apparatus for the Production of Roentgen, or " X " 

 Rays, in Action, (i) A source of current; (2) 

 Ruhmkorff induction coil; (3) Crookes' tubes; (4) 

 Fluoroscope, or fluoroscent screen. Series of radio- 

 graphs showing structures of body ; fractures and 

 foreign bodies. Exhibited by E. B. Meyrowitz. 



Apparatus for Projection, (i) For the lantern slide; 

 (2) for the microscopic slide. Exhibited by J. B. Colt 

 &Co. 



Process Work, (i) By screen; (2) by etching; (3) by 

 color. The stages of the processes are illustrated by 

 plates and prints. Exhibited by Heliotype Printing Co. , 

 Boston, Mass. 



Projection of Pictures in CdLOR. By means of colored 

 screens. Exhibited by J. B. Colt & Co. 



Examples of Lipmann's Process. A negative having the 

 color of the object is obtained directly from the object. 

 Exhibited by William Stratford. 



