The Optical Magic Lantern Journal (January 1893)

4 The Optical Magic Lantern Journal and Photographic Enlarger. The top mirror, B (Fig. 1), is removed, and | supported by a frame, H (fig. 2), above tho | objective, and can be adjusted so as to throw the image of the object upon a screen placed in front. The frame, H, is secured to the back of the | apparatus by means of set screws, working in slots, so that the mirror can be’ either raised or lowered as required. When using the vertical attachment I find I get better results by removing the condenser from the bottom lantern, and placing it in the lower circular hole, A’, which is made large enough to receive it. ——:0: —— A man has to be skilled in the use of a lantern, and know just what risk he takes, and the consequences of an explosion, just as much as an engineer when undertaking to run a steamboat. Mrrvaxr Bros. When speaking to an audience, raise the voice to such a pitch, as though you were addressing an individual seated at the far end of the hall. J. Broce Bryce. Condensers and Experiments with the Lantern. By Tuos. FretcHer. Mr. W. H Harrisoy, writing in December Journal, in which he recommends the triple condenser, evidently forgets that this form, although useful for common slide showing, is very objectionable when the lantern is used for physical demonstrations. The showing of pictures, good or bad, is not | the sole object of the lantern, and it is a method i of use which must eventually become of second ary importance. Even at the present time an entertainment which is devoted entirely to physical and optical experiments with the lantern, will draw a crowd, when a slide showing performance will, under the same conditions, bring together a very meagre audience. Of this I have myself had ample experience. If the double plano convex condenser is used, the front of the apparatus can be made to swing back, the front half of the condenser removed, and put in the vertical arrangement, without the necessity for shifting the lime dangerously near the condenser, dispensing also with an extra condenser, and the consequent loss of light. It is avery easy matter to make any new lantern so that it can be adapted for chemical, physical, and optical-experiments; and it is a mistaken policy to begin to construct a lantern ' in such a manner as to limit its power to picture showiug. Let any of the ordinary exhibitors of slides get up an amusing series of experiments vith the lantern, and he will at once appreciate the difference in both the number, and the interest of his audience. With a divided condenser, two mirrors, and a box, a first rate vertical arrangement can be made, costing very few shillings. With this, writing and sketching on an oiled ground glass slide, living insects, magnetic experiments, opaque objects, such as botanical specimens, and many other both amusing and interesting effects, can be provided with the greatest ease. Any one who can sketch well with the pencil can create an endless source of amusement, and with this arrangement it is quite as easy to sketch in the lantern as out of it, in fact it is easier, as drawings can be made any side up and turned round. A comic sketch done upside down, and then turned over, acts like a charm, and a live fly enlarged to 12 or 16 in. long running about and performing his toilet in public, has a charm far greater than the finest slide ever painted.