The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

Record Details:

Title:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Date:
1877
Publisher:
Philadelphia, J. A. Moore
Volume:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Leaf #:
00078
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.

SCIOPTICON MANUAL. 69 The preservative must be fresh. Three ounces of this mixture will prepare half a dozen 6£x8£ plates. If the preservative is poured over the plate, apply twice, working it well into the film; throw the first dose away, and use the second flowing for the first applica- tion to the next plate. The plates must be carefully dried, either by natural or by artificial heat.; a hot-water bottle will be found useful for that purpose should artificial heat be thought best. THE EXPOSURE Will depend upon the strength of the negative, and the nature of the light; a few seconds will generally be enough. Close contact is absolutely required to produce sharp positives. An ordinary printing-frame can be used. TO DEVELOP In a dark-room, remove the dry plate from the frame, place it in a dish, and flow over it Alcohol coo, ........ . i Water, ........... } equal parts. Then wash in running water. DEVELOPING SOLUTIONS. Pyrogallic Acid, ......... 2 grains. Water, ............ 1 ounce. Made from a stock-bottle of Alcohol, ............ 1 ounce. Pyrogallic Acid, ......... 96 grains. Five minims of this solutions contains one grain of pyro.