The Optical Magic Lantern Journal (February 1897)

The Optical Magic Lantern Journal and Photographic Enlarger. 23 Wales” Hotel, on 14th ult. After the supper a smoking concert was given, when a long and excellent programme was successfully carried through. During the evening the toast of ‘‘ Prosperity to the Firm ” was proposed, amidst much applause and musical honours, which was responded to by Mr. Frank Butcher. Dead baad ~ To Ascertain the Focus of a Lens.—A ready means of ascertaining this is as follows: Fasten a small sheet of white paper on the wall, say immediately opposite a window in a room, then hold the lens in front of this, front lens towards the window, and move backwards or forwards until a sharp image is seen on the paper of chimney pots or other objects in the distance. When the image is sharp, measure the distance from the sheet of paper to a point midway | between the front and back combinations of the lens. Supposing this to-measure eight inches, eight inches will be the equivalent focus of the lens. Sod ad nd Change of Proprietorship.—The business of D. Noakes & Son, of Greenwich, has been taken over by Mr. G. P. Norman (who has for many years been connected with Messrs. Watson & Son, of Holborn). We understand that Mr. D. W. Noakes will, however, continue to give his practical experience as hitherto, and that the firm in future will be known as Noakes & Norman. & te > History of Cinematographs.—On the 7th ult., an instructive paper was read by Mr. W. J. Coles, on the ‘‘ History and Development of the Cinematograph,” at the Camera Club, Charing Cross Road, W. After the reading a practical demonstration was given by means of Messrs. Wrench’s machine, which was considered practically noiseless and steady. It was found that a good powerful limelight jet was sufficient for all ordinary purposes. The jet selected was Locke’s patent high-power mixedgas get, which has already achieved a most ‘marked success. In the practical test it was found not very far behind the electric arc lamp, | which was afterwards used for the sake of comparison. a Decal oe X Ray Paper.—In another column mention is made of a paper brought out by The Eastman Photographic Materials Company, on which radiagraphs may be obtained instead of on glass as formerly practised. The Aintree Institute.—-This institute, built last year by Mr. W. P. Hartley at a cost of over £8,000, has recently been . presented by its generous founder with a magnificent lantern. The instrument, which is a special ‘Ideal ” supplied by Messrs. Archer -& Sons, of Liverpool, was used on the 15th: ylto. to illustrate a lecture given by Mr. William Lockier, of the Aintree Photographic Society, on “A Cruise on the Fjords of Norway,’ when its effective working was all that could be desired. Mr. Thos. W. Brooks, a member of the Institute Council, has been appointed lanternist. me m Road Albert Hall.—At the time of Dr. Barnardo's children’s entertainment at the Royal: Albert. Hall, the lantern contributed to no small extent to their enjoyment. Illustrations of the homes, inmates, practical results, and working of the homes were projected by Mr. D. Noakes on a 42 feet screen at long range. The: light was excellent, and speaks much for ‘“ Noakes’ special mixed,’ which was the form of jet used. We understand that Mr. C. W. Locke is again engaged at the Royal Albert Hall, Kensington, on behalf of the Royal Geographical Society, for the purpose of illustrating Dr. Nansen’s Arctic lecture. Mr. Locke will use the same powerful apparatus and jets as on his last occasion. The screen to be used is 37 feet 6 inches square, and the distance 166 feet 6 inches, giving a 35 feet disc. ood * bad . Exhibition —Photographic Society of Ireland-—On the 8th to 13th inst., wiil be held the annual exhibition in connection with the Photographic Society of Ireland. There will be an open class competition for gold, silver, and bronze medals, full particulars respecting which may be obtained from the Hon. Sec., Mr. Victor E. Smyth, 35, Dawson Street, Dublin. In our November journal we had the pleasure of recording the marriage of Miss Florence Adelaide Kcenig (daughter of Prof. Kcenig) to Mr. H. J. Hill (son of the well-known slide artist, Mr. W. R. Hill). It is now our painful duty to record the death of the bride of only a few months. Mrs. Hill caught a severe cold, from the effects of which she died (December 18th) after a week’s illness. We tender our deepest sympathies to Mr. Koenig, Mr, W. R. Hill, and Mr. H. J. Hill; and feel assured that we are also expressing the sentiments of those of our readers to whom they are well-known either in a business or friendly sense. a TE ET RT