The Optical Magic Lantern Journal (June 1896)

The Optical Magic Lantern Journal and Photographic Enlarger. 93 and New York, which certainly puts the American copyright law in a very unfavourable light. When the popular story “Ben Hur” was printed by Harpers, they reserved all rights to the publication and dramatisation of the novel, and afterwards sold the dramatisation rights to Messrs. Clarke & Coxe, a Western firm. Messrs. Riley, at considerable expense, have prepared an illustrated lantern lecture on the story, and Messrs. Clarke & Coxe now object to this as an infringement of their rights of dramatisation, and claim damages to the tune of 10,000 dollars. * BS aK In this country it might seem absurd to claim that a lantern entertainment is in effect a dramatic representation. The action is.a novel one, and is regarded as a test, and on the 20th ulto. Mr. Riley, sen., left Bradford for New York to defend the case. Mr. A. H. Saunners, of Birmingham, has a supply of X rays slides in stock taken from negatives by Dr. Hall Edwards. # * a Messrs. Wrencu & Son have acquired the patents rights of Mr. Friese Green, in connection with all the apparatus invented by him for making and producing so-called animated photographs on the screen. The apparatus is exceedingly simple in make, and will probably soon be put upon the market to sell for a few pounds. 38 ne cis In our last issue we stated that Dr. John Nicol had assumed the editorial management of the Photo American. We should have said the American Amateur Photographer instead, and haste to correct the error. Heh, Acetylene Gas for the Lantern. No. Il. THE general principle of a generator for | acetylene gas, as mentioned in an article in last issue, is to all intents and purposes one of the most simple and easiest methods of generating this gas in small quantities. Since the publication of our May number, we have received one of thegenerators manufactured | by the Acetylene Gas Company, of Ashford, Kent. It is composed of two tanks, one to hold the water, and the other the gas, the latter being, of course, inverted in the former. (4) represents the portion into which is poured | water, up to about the line shown in cut, the bell portion or gas holder proper being represented as (B). On a hook in the upper part of this is suspended the necessary basket or holder, which contains the requisite supply of calcium carbide. This basket (F) is made throughout of perforated zinc, which enables the water to drip away from the calcium as soon as the basket is raised out of it, by reason of some gas having been evolved. Having the basket made throughout with perforations, we consider an improvement on those which have a closed bottom and a series of perforations in the upper part only. From the bottom of the tank (A) are upright rods, on which the bell (8) slides up and down, , and which ensures this being kept perfectly upright. Most of our readers will, of course, understand the principle applied to gasaliers in houses, whereby they can be drawn down for a foot or so, there being a water-trap to prevent escape of gas. This principle is applied to the outlet pipe of this generator. The tap (£) having been turned on, the gas passes through the tube (c), which tube it will be noticed slides on the outside of another, which terminated at the tap (£), and as the upper pipe is continually immersed under the surface of the ; water, escape of gas is thus rendered impossible, while no resistance is offered to the rising and falling of (R). The makers claim that this generator will continue to work without attention for eight hours. The basket is capable of holding about two pounds of_calcium carbide, but when trying