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 #:
00084
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 V. THE LIME-LIGHT AND ITS MANAGEMENT. [HE lime-light was discovered about the year 1826 by Lieut. Drummond, R.E., during the progress of the Ordnance of Ireland Survey, when the want of some method of signalling between distant stations was much felt. As originally constructed, Drummond's lamp was very different to the convenient forms of lime jet now in use. It consisted of a blow-pipe, which impinged upon a ball of lime about as big as a marble. This lime ball did not last more than half an hour, but when spent another took its place automatically. The lime ball was placed in the focus of a parabolic silvered-copper reflector. With this apparatus, the light was visible from Antrim in Ireland, to Ben Lomond in Scotland, a distance of ninety- five miles as the crow flies. Upon another occasion, the light from the Drummond lamp was distinguishable at a distance of one hundred and twelve miles. When manufactured limes cannot be obtained, a piece of limestone fresh from the kiln can be sawn roughly to