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 #:
00043
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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CHAPTER III. OXYGEN GAS MAKING. [HE first requisite for the lime-light is an adequate quantity of oxygen gas, and this chapter will, therefore, be devoted to the details of its manu- facture, or rather its separation from those substances with which, in nature, it is associated. For, although the most abundant of all the elements, oxygen does not occur in the uncombined state, and, therefore, the chemist has to be at the pains of separating it from its various yoke- fellows. There are several methods of obtaining this gas ; the greater number of which, being only of experimental interest, may be passed over. The gas was originally discovered by Priestley in 1774, and at about the same time, independently, by the Swedish chemist, Scheele. Priestley obtained it by heating mer- curic oxide in a flask, which substance, under such treat- ment, breaks up into mercury vapour and oxygen gas. Such a method is clearly out of the question, when several feet of gas are required for the lime-light. Another method, which is applicable when large quan- tities of oxygen are wanted, and which has long been