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 #:
000452
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

APPENDIX 43? and a simple lever converges the three images into one harmonious whole (fig. 247). The effect, as the three crude and almost painfully glaring coloured images are resolved into one, and an artistically coloured picture suddenly springs into life, as it were, is an extremely pleasing one, and the instrument as now manufactured by Messrs. Newton & Co. forms a most useful addition to a lecturer's outfit. As all the parts, colour screens, mirrors, &c., are removable, the principle of the three so-called primary colours, and their FIG. 247.—Ives' Photochromoscope combination in the final picture, can be demonstrated step by step. When no slide is placed in the stage the appearance on the screen is that of three coloured discs producing white as they gradually converge and overlap, and if then a obstacle, such as the blade of a penknife, is placed in one of the stages, the shadow on the screen will have the complementary colour, composed of the union of the remaining two coloured discs. A good series of slides for this instrument is now obtainable, or, by means of a special dark slide which can be fitted to any good camera, amateurs can prepare their own subjects. An instrument for viewing these slides, instead of projecting them on the screen, is also obtainable, but a description of it hardly belongs to these pages. Objects for this latter instrument may be stereoscopic, as the arrangement is binocular.