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 #:
00094
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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THE BOOK OF THE LANTERX. 81 be not taken, the sudden influx of oxygen to the burner, when the dissolving lever is turned, will almost infallibly cause the flame to snap out with a sharp crack. The mixed jet is as easily worked as the safety form and —despite the confidence-inspiring name of the latter—is, in my opinion, quite as safe in careful hands. In some forms of mixed jets pumice-stone chambers, receptacles charged with discs of wire-gauze, and other arrangements which are supposed to prevent the flame passing back through the tubes, form part of the design. I look upon such contrivances as mere obstacles to the free passage of the gas \ and, although some of my jets were originally provided with them, I did away with them as quickly as possible. The dissolver for a triple lantern is naturally more com- plicated ; but taps have been devised which are so arranged FIG. 33. that any one of the three lanterns can be put in or out of action at will. Such a tap is shown at fig. 33. Another G