The Optical Magic Lantern Journal (November 1900)

i.e., 1 pint. It was then connected up to two jets of large bore, viz.,the F.B. jet, the supply of oxygen being obtained from a 20 feet oxygen cylinder. Although the two jets were connected only one was kept burning at a time, the other being kept at a bye-pass flame. Instantly we only went down after three hours by reason of the contents of the 20 feet cylinder being used. Being anxious to see how long the charge of ether would last under the circumstances, we attached found that under the same conditions a good light was obtained for a little over four hours, at the end of which time the lime showed no signs of incandescence when the direct oxygen side was turned off, the saturated hydrogen side) producing an ordinary flame like house gas. On continuing the light further for about half an hour, we found that in order to put the light out quietly it was necessary to first turn off the hydrogen side of jet. With the large bore mentioned we obtained an excellent light for the four hours, and used altogether about 80 feet of oxygen.. Had we used jets with a smaller bore of nipple, the duration of light would of course have been greatly prolonged. behaviour of this saturator, which will be found to work with, absolute safety with one charge | under the conditions mentioned. With it one who had never before used a saturator could not fail in getting a good light with practically no trouble. _ PARIS EXHIBITION SLIDES. Mr. E. H. Wilkie, of 114, Maygrove Road, West Hampstead, has become the fortunate possessor (by purchase) of 55 negatives of Paris views. These negatives are exceedingly fine, and lantern slides are being printed from them. We have seen a few of these slides, and they are excellent. SOLAR ECLIPSE SLIDE. Last May, Mr. Henry G. Fros:, of High Street, Deal, succeeded in obtaining a negative of the eclipse. Since that time, paper prints from this particular negative have been in good demand. Lanternists will be glad to learn that it is the ‘intention shortly to place upon the market Jantern slides from the negative mentioned. obtained an excellent light, which : (or | me (Gorrespondence, RSNSGXSXS> Reo omormsr SSX GuGye fe AURORA LANTERN SLIDE CLUB. To Mr. J. Hay Taylor, Editor. Dear S1r,—I have recently undertaken the duties of Hon. Secretary of the Aurora Lantern Slide Club, and as there are several vacancies in the number of members, I shall be glad to hear from any lanternoists, male or female, which would be willing to'join the club. The subscription is 3s. 6d. per annum; first and second prizes are awarded to the best and second. best sets sent : in by members to each quarterly circulation. another cylinder of oxygen, and : T. PERKINS. Turnworth Rectory, Blandford. ENTERTAINMENTS FOR WINTER EVENINGS. To Mr. J. Hay Taylor, Editor. Str,—Last winter you kindly noticed our effort to provide entertaining and instructive lantern lectures for institutions and societies throughout the country. May we be allowed to point out that we have improved upon our idea of last year by obtaining the services of several | popular writers to prepare lantern lectures, copies of which are sent (with slides) for a small fee to societies, institutions, schools, etc., who are uaable to afford the expense of paying large. sums to lecturers for their personal services. For the coming season we have arranged with: Sir Herbert Maxwell, Bart, M.P., to write on ‘A Century of Empire,” the Earl of Rosslyn on ' “«« With Roberts to Pretoria,’ Mr. Clement K. Shorter We were greatly pleased with the | on ‘' Illustrated Journalism, Yesterday and To-day,” and Mr. Arthur Croxton on “ An Evening with Punch.” Particulars of the above scheme will be sent to any of your readers on receipt of a stamped addressed envelope. We are, yours truly, * EYRE & SPOTTISWOODE. Great New Street, London, E.C. | INTELLIGENGE. es a Oe eee ea = —ES— —@ ~ PATENT The following List, relating to current Patent Applications, is compiled expressly for the ‘‘ Optical Magic Lantern Journal” by W. P. Thompson & Co., Patent Agents, of 322, High Holborn, London, W.C., to whom all enquiries for further information should be addressed. No. 16302. Reornt Patent APPLICATIONS. 13th September, 1900. George William Brown and George Robson Beaumont. The historyscope-—-an apparatus for showing or exhibiting motion photographs, framed and bordered with a stereoscopic frame.