OPTICAL PROJECTION 



A TREATISE ON THE 



USE OF THE LANTERN 



IN EXHIBITION AND SCIENTIFIC DEMONSTRATION 



BY 



LEWIS WEIGHT 



AUTHOR OF ' LIGHT : A COURSE OF EXPERIMENTAL OPTICS ' 



WITH 243 ILLUSTRATIONS 



FOURTH EDITION 

 FIFTH IMPRESSION 



REVISED BY RUSSELL S. WRIGHT 



LONGMANS, GKEEN, AND CO, 



39 PATERNOSTER ROW, LONDON 

 NEW YORK AND BOMBAY 



1906 



R 



All rights reserved 



