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 #:
000134
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 LANTERN. 121 Between development and fixation immerse plate in Sol. of Alum, 1 oz. in 20 ozs. water, washing carefully before and after. Pyro Bro. Ammon. ... Sulphite „ ... Distilled Water to I. Mist. Ox. Potass Brom. Potass Distilled Water c. ... 40grs. ... 60 „ ...200 „ ... 20 ozs. II. Liq. Ammonia, 880 ... Distilled Water ...20 Equal parts. D. ... 20 oz. avd. ... 40grs. .. SOozs.fld II. Ferrous Sulphate Distilled Water Sulphuric Acid 6 oz. avd. 18 „ fluid 12 mins. Add 7 parts of I. to 1 part of II. just before using. LANTERN SLIDES FROM PAPER PRINTS—ENGRAVINGS OB PHOTOGRAPHS. There are certain main principles to be observed in copying a photograph, or anj other kind of picture, if a satisfactory negative, fit for printing a lantern slide from, is to be expected. The copy should be illuminated by diffused light only, and should never receive the direct rays of the sun. A cloudless day is the best to choose, for then the light is regular, and when the exposure has been correctly calculated for the first picture, it will, during some hours of the day, be right for the rest. At least this is true, if we are copying a series of pictures of the same dimensions. But, if our first copy is, say, 12 inches across and our next one only carte de visite size—and we want to reproduce a negative of each, measuring 3J x 3J (the standard size for lantern pictures), our camera must in the