The Optical Magic Lantern Journal (January 1900)

Record Details:

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 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.

The Optical Magic Lantern Journal and Photographic Enlarger. xill. QPP 22 22.2.2 2.2.2, 2.9,9,9.9.9,9,9,9,9.9 9.0 0 ie 3e3i sESESESE ESESESERESORESEAOZESESEROSesOSeSEIOSE — IF YOU WISH TO KNOW 1,—What focus of lens is required to produce a certain size of disc, at a given distance ; 2.—What size of disc can be produced by a lens of given focus at a stated distance ; 3.—What distance a lantern must be from the screen to produce a certain sized disc with a lens of given focus ; SEND 23d. FOR A Ready Reference Table (On Cardboard) By J. HAY TAYLOR. FASTEN IT ON THE LID OF LANTERN BOX. MAGIC LANTERN JOURNAL COMPANY, LTD., 9, CARTHUSIAN STREET, LONDON, E.C.