The Optical Magic Lantern Journal (May 1893)

The Optical Magic Lantern Journal and Photographic Enlarger. 75 unnecessary to manipulate the wick spoken of, and it is merely necessary to turn on the oxygen to render the lime cylinder incandescent, and the more the oxygen is turned on, so does (to a certain extent) the spirit flame eularge. If the oxygen be turned completely off, the flame relapses to the small bead spoken of, consequently it will be seen that a jet of this character is excellent for a double or triple lantern, for no sooner is the oxygen turned off than the spirit flame immediately becomes reduced to a mere speck, consuming little or no spirit. The following cut shows the complete tl “tll HA piu i i I I a jet, the spirit being contained in the usual form of fountain reservoir. The oxygen supply is attached to the tap at the side, and the lime pin provided with a shield is inclined at the requisite angle to produce the best light. Crystal Palace Photographic Exhibition. ALTHOUGH this exhibition, which was held from the 10th—29th ult., was not on the large scale of those previously held at the same building, still it created a great deal of interest. The entries of photographic prints, although not so large as formerly, were nevertheless of great interest, and were displayed to the best advantage. The lantern slide exhibition which was held each evening in the theatre was well attended, and many had to be refused admit screen each evening. The applause given testified to their excellence. The exhibition of apparatus was small, but attendants were kept busy explaining and demonstrating to interested visitors. At the stand of Messrs. R. & J. Beck, their “ Frena " hand-camera (described in our issue for October, 1892) was the centre of attraction. A large and varied exhibit was on the stall occupied by Messrs. Theobald & Co., and consisted of lanterns, slides, cameras, lenses, and the hundred and one other articles seemingly required by the amateur protographer of the present day. Artists were at work showing how lantern transparencies were coloured, mounted, and finished. A new and inexpensive hand-camera, termed the ‘‘ Meteor” seemed to have a facination for visitors. As on former occasions, Messrs. D. Noakes & Son had turners and cabinet makers at work making and fitting up the respective parts of lanterns and cameras. Some fine lanterns were also on exhibition; while Mr. D. Noakes at various times demonstrated a new form of jet which he had recently patented, the chief points of which lay in the construction of the mixing chamber. The oxygen and hydrogen on entering the chamber B have, on striking the cone, a ‘‘ swirling” action imparted to them, and thence entered the chamber A by a small hole at the bottom of the cone. By the use of these double cone mixing chambers it is claimed that the light is improved and a noisy jet made silent. The other exhibits were a series of frames and moulding by Messrs. Couch. Castings, parts, and fittings for those desirous of constructing lanterns or cameras were exhibited by Messrs. Platt & Witte, on whose stand was also shown Clarkson’s ‘‘ Duplex’* Regulator, and filled safety gauge for gas cylinders. Enlarging, by the Cresco Fylma Co., was shown, in which the film underwent a swelling or stretching operation. The Incandescent Gas Co. had a series of lamps and reflectors fitted for showing the tance for want of room. &% Over fifteen hundred slides had been sent in, and about a couple of hundred of these {2% were projected upon the \@ Noakes’ JET