The Optical Magic Lantern Journal (April 1895)

The Optical Magic Lantern Journal and Photographic Enlarger. Messrs. Brins Oxygen Co. issue a certificate signed by Messrs. F. B. Grundy and A. Haddon in which they state that the following are the results of the analysis of oxygen obtained from Mr. Walter Tyler and also of the Brins’ oxygen as obtained from Messrs. J. H. Steward :— TYLER. BRINS. Per centage of Oxygen 80:2 956 rT Nitrogen 191 4-4 ” Carbon Dioxide 0:7 0-0 100 100 On the other hand Messrs. Riley Bros., of Bradford, sent two cylinders of Tyler’s gas and one of Brins, unlabelled as to which was which, but simply marked A, B and C, to Messrs. Stranger and Blount, of 2, Broadway, Westminster, who after analysis issued a certificate to the following effect :— TYLER. BRINS. A, B. Cc. Per centage of Oxygen 93:72 93:02 91°68 ra Nitrogen 553 598 8:32 Carbon Dioxide 0°75 1:00 0:00 100 100 100 The question as to the relative qualities of the gas as compared with that made from chlorate of potash has in no way been called into account. ——:0:—— Lantern Slide Carriers. By F. H. Buake. Wratr a number of different kinds of slide carriers we have placed before us! A number of years ago we had the slides mounted in frames, &c., and required no carriers. One of the very first forms of carriers was the push through carriers. It was formed of two strips of wood about 2 inch thick, with a groove inside each of them. At about 24 inch from the end of the carrier is a cross strip of wood, and about 3} inch from the outside edge of the first strip (gE F) is the strip Gu, and 84 inchfroma H is another strip. When the first slide is put in it should be pushed, to be flush with the outside edge of © F; then the second slide should be pushed in so as to make that flush with © F, thus forcing the first slide in the open space (No. 2) through which the light is being passed, so the slide is projected on to the screen. When the third slide is put in similar to the first, the first slide is forced into the third space, from whence it can be taken out. This, like most others, has 67 to have the slides taken out on the opposite as putin. The second carrier, of which I wish to speak, is known as the lightning carrier. | This carrier is a very good one for the time it was produced, but now we have several which surpass it easily. It is rather inconvenient because, as before, the slide ig put in on one side, and has to be taken out on the opposite side, so that as the operator has to stretch out his arm to the other side, walk round to the other CVO view FaONT SVEDATTaN ° side, or else employ another man-— one to put them in and one to take them out. Well, of course, people did not want it to cost ! too much, and did not see why they should pay two men when one could do the work. ‘The well-known Mr. R. R. Beard then devised a form of carrier by which in a bi-unial lantern allowed the slides to be put in at one end, and . taken out at the same side, thus one man doing the work of two men. This form of carrier was known as Beard’s Self Centreing Carrier. The advantage of this form of carrier is that no inatter what the length of the lantern photo or slide is, it becomes automatically centred on being placed on the brass runner and pushed home. By this means any of the commercial photographs (English, Scotch, French, and American) can be used alternately or successively in the dark with perfect safety with infallible results, and, as before described, can be put in and taken out from the same side. Another carrier which is used for single lanterns, is the ‘‘ Eclipse Carrier,” that manufactured by the same maker. In this carrier the slides can be drawn from the same side as put in; no finger marking on slides as the slides need only be held with the finger and thumb by the corner. It also affords ease and comfort to the operator. The judges of the Royal Cornwall Exhibition highly commended this form of carrier. Now, let us go to some of the most recent forms, those that have just been put on the market. The ‘‘Uno Mano”’ is one of the latest, and is worked on the same principle as the Eclipse, only instead of the brass runner in the Eclipse. it is made of xylonite, curved at the end. From the name of it we see that it means ‘‘ by one hand or with one hand,’ from the Latin “«Unus—one,” and Manus—hand. This is also a simple form of a carrier, and is also very good, being very easy and comfortable to work with.