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

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 #:
00075
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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62 THE BOOK OF THE LANTERN. having them constructed, and as they answer their purpose most perfectly, I will describe them. They are what are called skeleton-boards ; that is to say, they consist of frames filled in with sail-cloth. This mode of construction saves a great amount of weight. The wood-work is of best pine, 1J inches thick, and is mortised at every joint. Referring to fig. 27, it will be seen that the upper frame is furnished with a couple of A FIG. 27. FIG. 28. hinged shelves, between which the weights are placed. These shelves are made of hard wood, so that they will not readily break. The lower frame (fig. 28) has let into it a smaller frame, which, when the boards are not in use, is bolted into the main frame for travelling. But when in use, this lower frame is caused to fall downwards, so that it acts as a support for the pressure-boards, keeping them at the right angle. The hinges which connect the two