The Optical Magic Lantern Journal (February 1892)

THE OPTICAL MAGIC LANTERN JOURNAL ——~ PHOTOGRAPHIC ENLARGER. EDITED BY J. HAY TAYLOR. Vol. 3.—No. 33. Ceainieres ian. FEB. 1, 1892. Price One Penny. CONTENTS. Notes... ... 13 Instructions for. Inexperienced 1. anternists—No. ) l4 Jets for Saturators : Fie, wees ARE. See. heise 15 The Lanternist's Den No.1 ... 16 Size of Disc for a Room ... bis. ie 17 Cause of Oil Lamps Burning imperfectly {aig Sans. ates Ww The Optical Lantern in Class-Room Work—No. 1... 18 Pressure Gauges for High Pressure Gases.. 19 Editorial Table ae, etd SS ads 22 Society Meetings ... 23 Correspondence— Stereoscopic Effects with the meals Lantern ... 24 Paper Lantern Slides... ... By 25 Ether Saturators ... we 25 Public Lanternists should have ‘a Certificate of. Efficiency we 20 Notes and Queries dean A ae, Take RE eer cays 26 Notices. THE ‘Optical Magic Lantern Journal and Photographic Enlarger is issued on the Ist of every month, price One Penny, and may be obtained from all Newsvendors, Railway News Stalls, Photographic Dealers, or from the Publishers, at the following rates, post free :— Continental. United States. 12 months 1/6 “2/60 cents. Single copies... -/r} ... -/2 6, Advertisements (Scale of Charges), displayed :— 4 s. d Front and back pages, by arrangement. Ordinary page, fee matter(whole) ... 3 0 O ” ” (half) E15 0 a 3 Sain eae I 00 ” ” (eighth) . 10 0 iy ‘i per 1 inch in column ... 6 0 ” y ” $ ” ” see 3 0 Special quotations for a series. EXCHANGE Column, General Wants, &c. (not Trade)— First 20 words, 6d.; and for every 3 additional words, 1d ADVERTISEMENTS must reach the office not later than the 24th of each month. AIl cheques and postal orders to be made payable'to Taylor Brothers. EDITORIAL communications must be addressed, The Editor; advertisements and business communications to Taylor Brothers, care of the Publishers, Dorset Works, Salistury Square, Fleet Street, London, E.C. American Agents : —The International News Co., 83 and 85, Duane Street, New York City, lexplosion if he tried. _ advantage, remove what he terms Notes. LANTERN Stipes of H.R.H. the late Duke of Clarence and Avondale, and Cardinal Manning, have just been published by Messrs. G. W. Wilson and Co., of Aberdeen, and Mr. Underhill, of Croydon, particulars of which will be found in their advertisements on another page. ? * 2 M. Dronter has devised a new magnesium lamp which burns without attention for regular periods of twenty-four hours. A pound of magnesium is consumed in about one hundred hours. The running expense is about 1s. 6d. an hour, but with the anticipated great reduction in the price of the metal, the lamp may be made fairly economical. ? 2 2 Since the recent explosion at Ilkeston we have received some rather amusing descriptions o safeguards employed by (shall we term them) lanternists. One party writes that he intends to use the lantern with all the safeguards possible, and gives adescription of them. He uses a blow-through jet, and has had pumice tubes fitted immediately behind the O. and H. taps ; another close to the burner, from which he obtains the hydrogen ; anda fourth at the oxygen bottle, which is fitted with a regulator, yet he states, in spite of all this, “I found the taps of jet hot. Is this arrangement quite safe, or can you suggest anything else?” As we have not replied in Notes and Queries to this question, we will here state that our friend need not be in the slightest degree alarmed. The blow-through jet is quite safe, with H from the main, and O from a cylinder, and he could not have an He might also, with “safeguards ” (pumice tubes), as they are of no use, and only in ‘the way; in fact, they are worse than useless, * ca s THERE seems a probability of lanternists using the electric light shortly, as a company is at present being formed for fitting up houses with electric light on the hire system, which is