Optical projection: a treatise on the use of the lantern in exhibition and scientific demonstration (1906)

Record Details:

Title:
Optical projection: a treatise on the use of the lantern in exhibition and scientific demonstration
Date:
1906
Author:
Wright, Lewis, 1838-1905
Publisher:
London, New York, Bombay : Longmans, Green and Co.
Volume:
Optical projection: a treatise on the use of the lantern in exhibition and scientific demonstration
Leaf #:
000437
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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422 OPTICAL PROJECTION is left for any explosive mixture ; and (2) by dispensing as much as possible with long rubber connections. Saturators are now either placed within the lantern itself, as in the * Gridiron' or ' Lawson ' forms, or hung as near to the taps of the jet as possible. In the former case the generator itself gets hot with the warmth of the lantern, and the evaporation of the ether is thereby so much accelerated that the supply of oxygen passing through the ether must gradually be turned off. After half an hour's use in a small lantern, such a generator usually pro- duces enough ether-gas by its own evaporation, and only free FIG. 237.—'Gridiron' Saturator oxygen at the mixing chamber is required. In the * Gridiron ' form (fig. 237), which is one ofthe best of its type, there are three taps: one to control the supply of oxygen passing through the generator, one to control the supply of free oxygen to the mixing chamber, and one to control the supply of ether-gas (or ether and oxygen, as the case may be) to the chamber. I have found in practice that, after stopping the supply of oxygen to the ether, the evaporation still sometimes goes on so fast that the third tap, connecting the ether chamber with the nipple, has to be partially turned off as well. There is a disagreeable feeling of ' sitting on the safety-valve' in doing this, but in reality the