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 #:
00099
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 VI. SCREENS. this head comes the sheet, hung in the required position by supporting cords, and screens fixed on built-up frames. First, as to the simple sheet. A badly-hung sheet is an abomination. It should be so hung that there is a cer- tain pall upon it from the centre to the edges all round, and this may b3 brought about by following the directions now given. The sheet may be made of either linen or cotton. I prefer the latter, because it is cheaper, and more opaque, and we shall presently see that opacity car- ries with it certain advantages. . If the sheet is of such a size that it must be joined (that is to say, if it be more than about 10 feet square), the necessary seams should lie horizontally, not vertically. A sheet in which the seams are vertical, is liable to hang in festoon-like folds ; but if the seams be horizontal, it will hang straight, so long as its top edge is properly secured. The sheet should have along this edge a broad hem, in which is run a strong cord- This cord should be firmly fastened to the corners of the