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194
The Optical Magic Lantern Journal and Photographic Enlarger.
refilled without any interruption of the making and using of the gas.
““ PRIMUS” NOVELTIES.—PHOTOGRAVETTE. Messrs. Butcher, of Blackheath, ever on the
look out for novelties, have brought out what |;
’
they term the ‘‘photogravette’’ for copying
illustrations from books. The following
directions will show the mode for using this appliance :—
1. By gas light, place the book from which you wish to copy the print in a convenient position, about 5 feet from the gas burner. It need not be on a level. There must be no printing or damp marks on the back of the print. Care muet be taken not to press against the
binding.
2. Arrange the book so as not to strain the back, and lay the sheet of glass in proper position behind the picture, as in Fig. IJ.
3. Lay the carrier with opening (for } or }4-plate as desired) over picture or portion of picture required
to copy, seeing that it and the glass fit over each |
other. Do this by gas light.
. Turn out the gas, and by ruby light insert an ordinary dry plate of the requisite size into the carrier, pressing well down on the picture. Itis well to put a piece of card, size of negative, on the top to secure pressure. Lay base-board on the top of this, and clamp at the top, bottom, and sides. Turn the glass side upwards, light the gas, and expose for one or two minutes, according to density of picture and rapidity of plate.
v4
Fig. II.
5. Turn out gas, remove clips, release negative, which may i be developed, fixed and washed as usual, only development must be till it is very dark at the back, or the picture will not look like an engraving.
SLIDE MASKS.
Sixteen different sizes and shapes of lantern slide masks are put up by the same firm, either in one shape or assorted. These will be found exceedingly useful.
‘‘PRIMUS'” DIAGRAM PLATES Are put up in boxes of six, with an etching point. The plates are opaque, and show white lines when sketched upon with the pointer. These plates when placed in the lantern show a picture after the style of tke illustration. NOTICE PLATES. These are clear glass coated with a particular varnish upon which any announcement can be written with ordinary pen and ink. The ink remains with a sharp and crisp edge.
RILEY BROS.’ KINEOPTOSCOPE. There seems promise of more apparatus for the projection of animated photographs on the
Fig I. One of the latest is by Messrs. Riley Bros., of Bradford. apparatus (Fig. I.) is separate and distinct from the lantern itself, and can be applied to any lantern provided with a tolerably wide stage. The appliance is merely pushed in after the
screen. that brought out
This
style of a slide (Fig. II.). We have not yet seen this apparatus at work, but as everything that is introduced by this firm is of the highest