The book of lantern ; being a practical guide to the working of the optical (1888)

Page scan 00073 from The book of lantern ; being a practical guide to the working of the optical

Record Details:

Title:
The book of lantern ; being a practical guide to the working of the optical
Date:
1888
Publisher:
London : Wyman & Sons
Volume:
The book of lantern ; being a practical guide to the working of the optical (or magic) lantern ; with full and precise directions for making and colouring lantern pictures
Leaf #:
00073
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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60 THE BOOK OF THE LANTERN. emergency. In some of my experimental lectures, where I require a lime-light for occasional use on the plat- FIG. 26. form, I carry with me a small bag holding only three feet of gas, and a special form of pressure board which I have designed for the purpose. It consists simply of two pieces of inch board, each pierced on one edge with corresponding centre-bit holes three-quarters of an inch in diameter- Into these holes fit half a dozen round rods of pine. A couple of pieces of wood screwed to the under edge of one of these pieces of board serve as a support to the twenty- eight-pound weight employed. The lower part of this skeleton pressure board is furnished with a couple of bolts which shoot out, and into two screw eyes, fastened to the floor. The whole arrangement will be rendered clear by the annexed sketch (fig. 26). I merely describe it here in the hope that it may be as useful to others as it has been to myself.