PUBLISHERS' NOTICES 



107 



'Tis not in mortals to COMMAND success, but we'll do more, Sempronius, we'll DESERVE IT. 



— Addison: Cato. 



Remarkable Effects in Illumination. 



The illumination at the Panama-Pa- 

 cific Exposition in San Francisco, over 

 which so many visitors have gone into 

 ecstacies, depends to a great extent upon 

 powerful searchlights and retiectors 

 made by the Bausch & Lomb Optical Co 

 of Rochester. Xen' York. 



ace of Horticulture, said to be the largest 

 structure of glass in the world. It is 

 illuminated with twelve thirty-six-inch 

 searchlights which direct the light upon 

 the great globe of glass while revolving 

 disks cause an ever-changing procession 

 of colors to follow each other across the 

 dome. 



THE EXHIBIT OF THE BAUSCH & LOMB OPTICAL COMPANY AT THE PANAMA EXPOSITION. 



The great Tower of Jewels, the domi- 

 nant feature of the illuminating system, 

 furnishes the most striking efifect of the 

 searchlights. The 125,000 cut glass 



prisms, with which the structure is hung, 

 reflect all the colors of the rainbow un- 

 der the searchlights' rays. 



Another feature for which a large or- 

 der was placed with the Bausch & Lomb 

 Company is the illumination of the Pal- 



The order placed with the Bausch & 

 Lomb Optical Company called for 450 

 twelve-inch spherical mirrors, 200 

 eighteen, and 25 thirty-inch parabolic, 

 and 48 mirrors of the twentv-six-inch 

 (three-foot) size — a total of ^2}^ mir- 

 rors. Parabolic mirrors are not like an 

 ordinary mirror. In shape they resem- 

 ble the pointed end of an ^^%. They 

 must be accurately ground and polished, 



