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Aviation History
1925
1925 - 0090.PDF
AIR POST STAMPS By DOUGLAS B. ARMSTRONG Canadian Air Stamps A SECOND semi-official air stamp has now been issued in connection with the daily air mail service between Hailey- bury, Ont., and Rouyn Township via Angliers, which has been operated by the Laurentide Co. under Government authority since September 1, 1924. It is of the same deno- mination as before, viz. 25 cents., but printed in red and of a more elaborate design, showing an aeroplane flying over the mountains with the rising sun in the background, the work of Mr. J. M. Meekison. The inscriptions read " SPECIAL AIR DELIVERY—CANADA, 1924—LAURENTIDE AIR SERVICE, LTD." The stamp is supplied either in booklets of eight, price $2, or sheets of 20, price §5. The initial printing of 4,500 stamps was carried out by the Dodd-Simpson Press, Ltd., with the aid of dies produced by the British and Colonial Press, Ltd. By arrangement with the Dominion Post Office all letters, etc., must be fully prepaid in regular Canadian postage stamps, the special label representing the air post fee being affixed on the backs. The first issue, as previously noted, was a green stamp, without special design, and separated by means of a roulette, in lieu of the usual per- foration. A special souvenir label was also affixed to letters carried by air from Estevan to Winnipeg on October 1, 1924, in a design by Mr. Donald Dunbar, editor of the Estevan Mercury, depicting an aeroplane in the clouds over the town with a section of a coal mine and a miner at work beneath it. The vignette bears the words " First Saskatchewan Aerial Mail— Estevan, Winnipeg, October 1, 1924," the total numbei sold being 1,128, of which the greater proportion were used on the mail of 1,926 letters, etc., handed to the aviator, Flight-Lieut. E. A. Alton, for conveyance. Unfortunately the journey was not completed as the machine crashed when only ten miles from the starting point. Mystery Air Stamp. A CONTINENTAL stamp journal chronicles with all reserve a hitherto unrecorded set of Costa Rican air post stamps, which appears to have been issued in May last. It consists of the 1 centimo postage stamp in the type of 1910 (San Maria Monument) overprinted with the device of an aeroplane within a double-lined rectangular frame in red, together with the inscription " CORREO AEREO, 1924," and the following values in surcharge: 8, 16, 32, 64 cts. and 1 COLON. The postmark is circular in form and contains the words " SAN JOSE-LIMON-CORREO AEREO, Mayo 1A, 1924." Assuming the issue to be authentic it is curious that nothing has been heard of it by air post specialists until seven months after its appear- ance. Inverted overprints are said to exist. Air Post History in the Making HISTORIC flights that have furnished valued material for the air post collection during the past year in the form of flown covers with distinguishing cachets or postmarks, are the American round-the-world flight, the Dutch flight from Amsterdam to Batavia, the Junker flight from Berlin to Angora, the Trans-Atlantic flight of the dirigible Z.R.3 and the first trip over the U.S.A. Trans-Continental air mail route on July 1, 1924. Several flights of lesser importance are also denoted by special marks or cachets, including Buenos Ayres-Montevidco, Berlin-Stockholm night flight, Constantinople-Paris (Octo- ber 20), Estevan-Winnipeg (uncompleted), and the Dayton International air races. Amundsen's projected flight to the North Pole failed to materialise, so that the special souvenir stamps and cards prepared were not put into use. Air post stamps of a semi-official character were issued for the first time in Canada by the Laurentide Air Service, Ltd., by permission of the dominion Postal Authorities. A recrudescence of special vignettes in connection with flying days in different parts of Switzerland was not untainted with a suspicion of speculative origin, and led to publication of an official disclaimer by the Swiss post office, calling attention to the unauthorised nature of these soi-disant " stamps." m -M m m The Schilovsky Turn Indicator WE have been asked to state that enquiries relating to the Schilovsky gyroscopic turn indicator described and illustrated in our issue of January 29, 1925, should be addressed not to Bncknall and Riches, of 8, Southampton Row, but to Aircraft Patents, Ltd., of 4, Broad Street Place, London, E.C.2, who hold the sole manufacturing and selling rights for this invention. FEBRUARY 12, 1925 PUBLICATIONS RECEIVED Technical Notes : No. 205— The Logarithmic Polar Curve. By V. Cronstedt. October, 1924. No. 206.—Structural Weight of Aircraft as Affected by the System of Design. By C. W. Hall. November, 1924. No. 207.—The Simplifying Assumptions, Reducing the Strict Application of Classical Hydrodynamics to Practical Aeronautical Computations. By M. *M. Munk. November, 1924. No. 208.—Tests on Duralumin Columns for Aircraft Construction. By J. G. Lee. November, 1924. U.S. National Advisory Committee for Aeronautics, Navy Building, Washington, D.C., U.S.A. Calendar, 1925. Palmer Tyre, Ltd., 119-123, Shaftesbury Avenue, London, W.C. 2. Transactions. December, 1924. Vol. LXVIII, Part II. Institution of Engineers and Shipbuilders in Scotland, Elm bank, Crescent, Glasgow. The Air Pilot Monthly Supplement. No. 3. January, 1925. Air Ministry, Kingsway, London, W.C. 2. Catalogue of Aeronautical Collection in the Science Museum, South Kensington. Compiled by M. J. B. Davy. 1924. H.M. Stationery Office, Kingsway, London, W.C.2. Price Is. net. The Law Relating to the Air. By R. B. Sparkes, M.C., F.R.G.S. Stevens and Sons, Ltd., 119-120, Chancery Lane, London, W.C. I'rice 3s. 6d. net. Revue Juridiqtte Internationale de la Locomotion Aerienne. December, 1924. Edition Aerienne, 4, Rue Tronchet, Paris. Illustrated Calendar for 1925. The Blackburn Aeroplane and Motor Co., L'.d., Olympia, Leeds. Aerwiautical Research Committee, Reports and Memoranda : No. 925 (E. 11).—An Improved Model of Optical Indicator. By W. J. Stern and H. Moss. October, 1924. Price Is. 6</. net. No. 931 (E. 12).—The Friction of Pistons and Piston Rings. By T. E. Stanton. July. 1924. Price Ad. net. H.M. Stationery Office, Kingswav, London, W.C.2. m m m m NEW COMPANY REGISTERED AIRCRAFT MATERIALS, LTD., 109, Jermyn Street, St. James's, SAW 1.—Capital /3,UUU. in £l shares. Manufacturers of and dealers in all materials lor the construction, equipment, maintenance, or running of aeroplanes,airships, hydroplanes, flying boats, and for aeronautical or other engines or motors, etc. lirst directors, C. \V. Meredith and J. H. Meredith m a? w, m AERONAUTICAL PATENT SPECIFICATIONS Abbreviations: Cyl. = cylinder; i.e. «= internal combustion; m. — motor.The numbers in brackets are those under which the Specifications will be printed and abridged, etc. APPLIED FOR IN 1923Published February 12, 1925 •22.54 1. D. J. MOONEY. Ribs, cross-members, etc., for aircraft. (227,48*2.) 27.152. ARMSTRONG SIDDELEY MOTORS, LTD., and S. M. VIALF.. Valve-operating gear for fluid-pressure engines with radially arranged cylinders. (227,549.) 27.153. ARMSTRONG SIDDELEY MOTORS, LTD., and S. M. VIALE. Apparatusfor filtering liquids. (227,550.) 27.768. A. ROHRBACH. Wings for metal airplanes. (206,514.)27.769. A. ROHRBACH. Tanks for carrying liquids on aircraft. (206,515.) 3(1,856. SCHNLIDFR FT CIK. Landing carriages for aircraft. (224,486.1 APPLIED FOR IN 1924Published February 12, 1925 8,792. Soc. DV CARBLRATEL'R ZENITH. Device for automatic altitudecontrol of carburettors. (214,241.) 21,28.S. Soc. ANON, DFS AVIOKS M. WIBAULT. Surfaces or parts of aero-planes. (221,803.) FLIGHT The Aircraft Engineer and Airships 36, GREAT QUEEN STREET, KINGSWAY, W.C. 2. Telegraphic address : Truditur, Westcent, London. Telephone : Gerrard 1828. SUBSCRIPTION RATES " FLIGHT " will be forwarded, post free, at the following rates ;— UNITED KINGDOM s. d. 3 Months, Post Free.. 7 7 6 „ „ ..15 2 12 „ ,, ..30 4 ABROAD* 3 Months, Post Free. 6 12 s. . 8 .16 .33 d. 3 6 0 These rates are subject to any alteration found necessary under abnormal conditions and to increases in postage rates. * European subscriptions must be remitted in British currency Cheques and Post Office Orders should be made payable to ike Proprietors of " FLIGHT," 36, Great Queen Street, Kingsway, W.C. 2, and crossed London County and Westminster Bank, otherwise no responsibility will be accepted. Should any difficulty be experienced in procuring " FLIGHT "from local newsvendors, intending readers can obtain $ach issue direct from the Publishing Offies, by forwarding remittance asabove. 90
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