Bauhaus-Universität Weimar

Titel:
The Book of the Lantern. Being a Practical Guide to the Working of the Optical (or Magic) Lantern. With Full and Precise Directions for Making and Coloring Lantern Pictures.
Person:
Hepworth, T. C.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39440/214/
THE BOOK OF THE LANTERN. 
203 
place. The experiments can be varied by altering the 
position of the magnets, or by using knitting needles which 
have been just before magnetised at the lecture table. It 
will be noticed that these curve experiments require no 
battery power. They are performed with what are known 
as 'permanent magnets, in contradistinction to the electro 
magnet used with the special form of slide shown at 
fig. 52. 
In describing some of the experiments possible with the 
optical lantern, I have purposely refrained from detailing 
any of the splendid effects due to polarised light—for these 
have been already dealt with by my friend Mr. Lewis 
Wright, in a manner which it would be impossible to 
improve upon.1 
1 “ Light : a Course of Experimental Optics, chiefly with the 
Lantern.” Macmillan & Co.
        

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