X PREFACE. 



With these facts in view, I have long thought that 

 a thorough guide to the working of the optical lantern, 

 the preparation of its diagrams and pictures, the 

 colouring of the same, the production of photo- 

 micrographs, and everything pertaining to lantern 

 work, would fill a vacant place in technical literature. 

 Beyond the two or three shilling handbooks which 

 have appeared, there is nothing of the kind procurable; 

 and in the space available in such books, it is obvious 

 that the various matters to which I have referred 

 cannot be sufficiently dealt with. 



Some of the matter here printed has already 

 appeared in The Amateur Photographer, and in The 

 Camera. The author is indebted to the proprietors of 

 both those periodicals for their courtesy in allowing 

 both text and cuts to be reproduced in this work. 



T. C. HEPWORTH. 



45, ST. AUGUSTINE'S EOAD, CAMDEN SQUARE, 

 LONDON, N.W. 



November, 1888. 



