The Optical Magic Lantern Journal (November 1900)

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The Cptical Magic Lantern Journal and Photographic Enlarger. 147 Only a few months ago some friends were much enjoying a science lecture, but when about half-way through, the interest was upset by the upsetting of the lantern, or at any rate, — by the disc disappearing completely from the screen. The operator, who was working with a fly-carrier, was unaware that a slide had not fallen into position, and using, 1 presume, extra force to send the holder through, dislodged the books and other props that were supporting the lantern, which humpty-dumpty-like ‘had a great fall.” The lecture was finished, but without the lantern, and its interest waned : when the lantern disappeared. Scores of such incidents could be cited but . the one above mentioned is sufficient. Now, there is no earthly reason why such risks should still be. In the pages of THE OrticaL Magic LanTerNn JOURNAL, years ago, this very thing was obviated, was demonstrated, was adopted. ‘‘By whom?” says the present day reader. Well, wait a bit, dear Sirs, and I will tell you. also add that there is no earthly reason why such an attachment should not be added to every lantern sold—toy lanterns here are not recognised—when it is stated that the extra cost is practically nil. The highest class lantern KO) 8 could be fitted for, say, an additional five graphic Society of Philadelphia could not do shillings, the humble iron lantern for sixpence. Some articles that were published in Vols. But before doing so permit me to © brass headed screws, B, c. The brass plate is slotted to the size of the smooth pillar of screws. With screw b the plate is screwed to baseboard of lantern on the left side; the plate may be thus fixed that it works stiffly; screw c is placed at bottom left-hand corner of lantern body, sufficient space being left that the plate will work any of the slots over it. It will thus be seen, that as the lantern is raised on its plinth it can be held at the required height. This is a crude, simple, but efficient means of overcoming the difficulty, and such can be made and attached by anyone. oe SoG eee On the Mounting of Slides.* By WILLIAM S. VAUX, Jun. — T each of the business meetings of the Society of Friends they have a We good old custom, which has been y ewe handed down from time imme(E WS morial, of three times a year asking a q and answering certain questions or els, “+ queries on the condition of the society, 23 the behaviour of the members and the progress or retrogression of the past four months. The object of these queries is to keep before the minds of the members certain great truths which regulate the whole government of the body, and without which the organisation would sink to a mere formal existence. I have sometimes thought that the Photo : better than to adopt a somewhat similar custom 4,5, and 6, entitled ‘‘The Lanternist’s Den,” | by Mr. C. E. Rendle, contain in every particular detailed lessons in lantern construction, or lantern building, and on page 221, Vol. V., the subject of this article is for the first time mentioned and treated. In those most interesting instructions Mr. Rendle strongly recommends that all lantern bodies should be detached from the baseboard, but hinged thereto at the back, so that when the baseboard is thumb-screwed to ~ travelling case or lantern stand, as the case , may be, the lantern proper can be raised to any angle with impunity, and then he shows how it can safely be held in position. The suggestion at the time was adopted by some few makers, but only, I think, in the highest-class apparatus, whereas it should be supplied, as stated above, at @ nominal cost, and to every grade of lantern manufactured. The sketch annexed shows a piece of stout flat brass a, and a couple of rounded and formulate a set of queries which the members might consider from time to time, and that the first one might be framed something like this: « Are all our members careful to mount their slides in a uniform manner, with name labels and thumb labels in order for the help of the lantern operator, and where they find slides lacking these to use due expedition in supplying the deticiency ?” If such a query was put to the members tonight there are many who would have to admit they had been very lax in this respect, and, in fact, during the last few years hardly a . lantern night has passed without some slides perfectly innocent of labels being submitted for exhibition. Our English cousins, who generally do things ' the hardest possible way, and generally have a good reason for doing it, have adopted the *Lecture Photo. Socy. of Phila., U.S.A.