The Optical Magic Lantern Journal (November 1894)

The Optical Magic Lantern Journal and Photographic Enlarger. 197 THE ‘‘BESSUS’ BI-UNIAL LANTERN, by the same firm, has an ingenious method of rapid registration of the discs by means of rack and pinion. So as to get at the lime or condenser, the front of the lantern is made to hinge; the rotation of one milled head causes the up and downward motion to the fronts, whilst another causes a slight side motion. These adjustments can be made with rapidity and precision. ‘‘ BESSUS’’ FILM HOLDER. Some time ago we announced the fact that Messrs. Airs & Co., 152, Farringdon Road, had brought out a new form of plate holder; they have now introduced a somewhat similar holder LES for the use of films. As in the illustration, the film is merely laid on a particular form of skeleton holder, and the handle sprung in at the side which causes the film to be kept flat and in place during development, fixing, and drying. ELECTRIC ARC LAMP. The ‘‘ Newtonian ” arc lamp (Newton & Co., 3, Fleet Street, E.C.) will be found a most convenient lamp for lantern use. It is self feeding and focus-keeping. An ingenious indi cator fitted on the upper portion shows at a glance whether the electric supply wires have been properly connected. The stand in which the lamp is fastened is provided with means for centering. Editorial Table. “Sunsgine."' (London, Macmillan and Co., 6s.)— This useful book of five hundred pages, by Miss Amy Johnson, LL.A., is, we understand, the first of a series termed ‘‘ Nature's Story Books.” Illustrations and experiments in connection with Natural Science are here treated in a thoroughly interesting and instructive manner, and thus students are brought face to face with facts, which, if presented to them in any other way to that which Miss Johnson has adopted, might possibly to them seem dry reading. In this elementary work each subject glides into the other in so fascinating a manner that one becomes as it were wedded to the book itself, and the subject it treats of; and hence, by the aid of the 163 illustrations scattered throughout, one who perhaps previously had little or no inclination for scientitic subjects, finds therein a fund of information wherewith to lay a good foundation for further investigation. Lantern slides of most of the illustrations may be obtained. Eastuan's MaTTE SoLtio PaPER.—We have received a fine platinum-toned print on this paper. ‘fhe print is everything that could be desired. On another page we give the formule, so that those interested can try it for themselves. Art Fotio.—From Mr. W. Tylar, of Birmingham, we have received a folio of fine views printed by a permanent process. The pictures without the margin are. ed ins., and comprise Alton Towers, Tintera Abbey, Chepstow Castle, Hawarden Castle, Kenilworth Castle, Ann Hathaway's Cottage. These pictures are excellent, and the moderate price, 3s., renders them in the words of the auctioneer, ‘‘cheaper than the paper on the wall." SPoNGE SLIpDES.—A new set of 27 slides illustrating the sponge industry has been pudlisted by Messrs. Philip & Son, of Fleet-street. All the operations, diving, trimming, sorting, stringing, and packing, ara given, together with photographs of sponges ranging as high as £20 in value. Catalogues.—LrEa & Son, of Runcorn, have issued a new price list of their celebrated cylinders, valves, and fittings. The metal employed in the manufacture of the cylinders contains, we learn, about 145 per cent. combined carbon, and has a tensile strength of 26 tons per -square inch, with 20 per cent. elongation in a length of eight inches. “York's Scientific and Educational slides include ancient and modern bridges, heat, magnetism, electricity, telephone, phonograph, human philosophy, tea culture, astronomy, and astronomical instruments, spectrum apalysis, light, mechanics, and a selection of some of the best-known microscopical objects. From such a comprehensive list all tastes can be supplied. . ANDERTON's LANTERN STEREOSCOPE.—From the catalogue of this apparatus we learn that Mr. J. H. Steward, 406, Strand, W.C., has undertaken the agency for this valuable and interesting adjunct. WatTson.—A very concise and complete list of lanterns, fittings, and slides comes to hand from Mr. John Watson, 34, Grainger Street, Newcastle-on-Tyne. Any piece of apperatus will be sent on approval after deposit, or will be demonstrated at the show-rooms. UNDERBILL.—Mr. Alfred Underhill, Clarendon-road, West Croydon, in his new list, gives particulars of his series of dioramic effects to illustrate the chief features of the Autwerp Exhibition.