203 



SECTION 7. LIGHT. 



WEST GALLERY, UPPER FLOOR, ROOM (q 



DETERMINATION VELOCITY. 



791. Original Apparatus, by M. Fizeau, for measuring 

 the velocity of light. Polytechnic School, Paris. 



792. Apparatus, by M. Foucault, for measuring the velocity 

 of light. Polytechnic School, Paris. 





I. DISTRIBUTORS. 

 a. LENSES. 



794. Burning Glass (German), made probably by Count 

 von Tschirnhausen in the 18th century. The property of Prince 

 Pless Furstenstein. The Breslau Committee. 



798. Early Stereoscope, made by the late Sir David 

 Brewster, the inventor of this instrument. John Maclauchlan. 



798a. Early Stereoscopic Pictures, prior to the applica- 

 tion of photography. From the collection of the late Sir C. 

 Wheatstone. Robert Sabine. 



798b. Early Stereoscopic Pictures. Daguerreotypes of 

 1. Biot; 2, Bequerel ; 3, Foucault, from the collection of the late 

 Sir C. Wheatstone. Robert Sabine. 



798c. Seven Earliest designs for the Stereoscope 



printed in black and white. From the collection of the late Sir 

 C, Wheatstone. Robert Sabine. 



798d. Early Stereoscopic Pictures. Two Daguerreotypes 

 of Faraday, from the collection of the late Sir C. Wheatstone. 



Robert Sabine. 



799. Double Opera Glass. An early example, probably 

 made in Holland about 1700. Soiith Kensington Museum. 



801. Binocular Pield Glasses, Nos. 17, 29, 37. 



Voigtlander and Son (Chevalier von Voigtldndcr\ Bruns- 

 wick. 



