The Optical Magic Lantern Journal (May 1894)

102 The Optical Magic Lantern Journal and Photographic Enlarger. difference; so long as the print is under-printed, it can be brought up by the developer. Development is best done by ordinary lamplight without a yellow shade. Prints made by the above process are rather more brilliant than those fully printed out. More sulphite in No. 1 tends to make softer prints. Solution No. 3 requires a drop of carbolic acid if it is desired to keep indefinitely. The tannic acid is used only to harden the gelatine, Woop Bros,’ CaTatocur.— The 90 pp. catalogue of Wood, Bros., of Liverpool, contains a complete list of lenses and apparatus stocked by this firm. We observe that a special feature is made of the « Optic "' and «‘ Panso '’ Hand Cameras. Buair's InLustRaTED CaTALOGUE.—One seldom sees a more artistic catalogue than that issued by the European Biair Camera Co. (Ltd.), 9, Southampton-street, High Holborn, W.C. It is printed on thick surface paper, with large margin, the illustrations being clearly cut, and well printed. A short chapter is devoted to photography as a pastime, and interesting descriptions of the Blair cameras (Hawk eye and Kameret) are given with numerous illustrations. The body of the work does not contain a list of prices at every turn, these being reserved fora Separate page at the end. The whole arrangement of the catalogue fits it for a position on a parlour table if necessary. VELox DeEvELOPpER.—This new developer has been introduced by Messrs. Cadett and Neall, of plate fame. It is put up in convenient form, and the following special advantages are claimed for it :—(1) Extreme rapidity, making it ‘par excellence’'; the devoloper for shutter exposure and portraiture. (2) Quick action,—Normal negatives are developed in thirty or forty seconds. (3) Adaptibility.—It can be easily modified to suit over, as well as under, exposed negatives, and to give thin and delicate images, or dense and brilliant ones. (4) Good colour of the deposit suitable to the retoucher's pencil. (5) Solubility.—Solution is very quickly effected. (6) Portability.—The method of preparation enables great concentration. (7) Great keeping powers. —-.0:—_ Patent Intelligence. The following list, relating to current Patent Applications, is compiled expressly for ‘The Optical Magic Lantern Journal" by a registered Patent Ayent. For further information apply to S. Dicker, c/o“ The Optical Magic Lantern Journal,” 56, Chancery Lane, London, W.C. No. RECENT PATENT APPLICATIONS. 6518, 2 April. Ashleigh Thorp. A dissolving and effect slide carrier for use. with a single magic lantern. Alfred Bleckynden and William Dunlop. An improved oxy-hydrogen jet for optical or other lanterns. Gustave Donat and Joseph C. Plunkett. Improved valve applicable to cylinders or vessels containing compound gases, H. H. Lake, (Edmond Hudson.) Improvements in stereopticons or magic lanterns. Everard Hesketh and Alexander Marcet. Improvements in flasks or cylinders for containing gases under pressure or liquifaction or the like. CompLeTe SPEcIFICATION PRINTED. 1024 of 1893. Malden. Chamber jets for oxy-hydrogen limelight effects. 6613. 3 April. 7022, 9 April. 7136. 10 April. 7326. 12 April. Correspondence. Re ASKEW LANTERN BOX. To the Editor. Srz,—Messrs. Sharp and Hitchmough and myself are at one in our intention not to “carry on a lot of correspondence.” I will be as brief as possible in my reply to their letter, which, for dissecting purposes, I will divide into six parte. (1) These letters (quoted) “are the whole of the correspondence,” etc. (2) ‘We would ask Mr. Askew if he considers he is entitled to the honour of inventing atripod for the use of the lantern ? " (3) ‘ Also to the revolving of the lantern-box with & McKellan turn-table ? '’ (4) “The chief thing claimed is that by the elevation of the tilting-board it creates a better draught for the lamp.” (5) “ Fifteen years ago the Sciopticon Company introduced a lantern-box with let-down sides... .. Mr. W. 1. Chadwick made a similar case for the Manchester Photographic Society... .. Mr. Askew, and not us, is the copyist.”” (6) ‘‘ We very much doubt if any of them" (my nine claims) ‘“‘ are worth the paper they are written upon."' To which I reply : (1), Having shifted my residence some 200 miles since the autumn of 1891, and not having preserved what I considered: the unimportant part of my correspondence, I am unable to produce proof positive, so must, therefore, grudgingly concede this point to Messrs. S. & H. (2) Never tried to invent a tripod; there were plenty in the market, and I only devised what, to me, Was @ necessary piece of apparatus, not at tne time to be found in the trade catalogues.” (3) Don't know what a McKellan turn-table is, unless it's that very ingenious arrangement in the base of modern light cameras. My old camera merely had a nut inserted, and I was obliged to stoop down and fumble about with the screw before I could fix iton the tripod. To avoid this, in my lantern-box I had @ circular tripod-head made, and formed a disc in baseboard to receive it, so that I could screw on in the dark. If this primitive arrangement is, in itself, original, I hereby make a present of it to the trade, and would suggest that it be called the ‘ Jack Robinson "” turn-table ! (4) Nothing of the sort. The tilting-board and reading desk which Mesers. S. & H. have so faithfully reproduced, together with the ‘‘turn-table,”” were mere after-thoughts, and claimed “ in combination” with the main design. (5) Fifteen thousand years ago, or thereabout, Noah made an ark. That ark was made of wood, and the door thereof was ‘‘set in the side.” Thus far it’ was the prototype of my box, but in other details it materially differed. The Sciopticor box, and that made by Mr. W. I. Chadwick (drawings of which that gentleman sent me), is about as like my box as my box is like Noah’s ark.