220, 222, 224, BISHOPSGATE, LONDON, E.C. _Telephone 3811 HOP. Telegrams: "BUCHERON."_ Joseph Owen & Sons, L^{imited,} SUPPLY EVERY DESCRIPTION OF TIMBER FOR Aeroplanes, Hydroplanes, Airships. SEND YOUR ENQUIRIES TO 199a, BOROUGH HIGH STREET, LONDON, SE. FLANDERS MONOPLANES & BIPLANES For Land or Water. L. HOWARD-FLANDERS, LIMITED, 31, Townshend Terrace, RICHMOND, Surrey. [Illustration] EISEMANN DYNAMO Although designed for use with accumulators--=gives results without= damaging filaments =without the use of accumulators=. Perfectly automatic in action. Used on the =Zeppelin=. =Types= 8 volts 9 amps. 12 volts 15-20 amps. Eisemann Automatic Advance Magneto Used on the Mercedes--Gnome--Schutte Lanz--Dixi, etc., etc. Entirely weatherproof--advances and retards the spark periodicity according to engine revolutions. Latest models as used on above engines both single and dual. Fullest Particulars on hearing from you. THE EISEMANN MAGNETO Co. 43, Berners Street, W. Telegrams:-- Roussillon-ox, London. Telephone 4601 City. A.B.C. Code 5th Edition. C. D. C. [Illustration] _The_ Aircraft of the World perform best on the best Spirit. The rapidly growing [Illustration: _Preference for_ PRATT'S Perfection Motor Spirit among airmen is a repetition of history. In Motoring, on the Road, the consistent Purity and Reliability--the sheer, hard, practical Service of "Miles to the Gallon" has long established PRATT'S as the premier Motor Spirit. "_In Earth and Skie and Sea"--PRATT'S first shall be!_ [Illustration: _By Appointment_] _In the Air, as on the Road, PRATT'S is "THE MOVING SPIRIT OF THE AGE!"_ Telegraphic Address: "JONBRO," MANCHESTER. JONES BROTHERS LIMITED, =Spinners & Manufacturers,= 12, YORK STREET, Manchester. [Illustration: BEDFORD NEW MILLS, LEIGH, LANCASHIRE.] _THE "AERO" Cotton Fabrics for Aeroplanes._ H. VALDENAIRE, ADENET & Cie. PARIS--21, Rue des Jeuneurs--PARIS. TISSUS DE GRANDE RESISTANCE FOURNISSEURS HABITUELS des PRINCIPALES MARQUES d'AVIATION et d'AEROSTATION KEMP MOTORS [Illustration] Are air cooled and are the most efficient, economical and reliable power plants on the market sold at reasonable prices. Built in four sizes to meet all requirements from experimental purposes to commercial use. ~FULL PARTICULARS ON REQUEST.~ KEMP MACHINE WORKS, MUNCIE, INDIANA, U.S.A. "AFTER 13 HOURS UNDER WATER" the MEA (_The Magneto with the Bell-shaped Magnet_) RAN PERFECTLY. "One of your Magnetos delivered to us last year has had a severe test, proving it to be absolutely water-proof. It was fitted to an engine in a motor boat, which towards 7 p.m. ran full of water: next morning about 9 a.m. we pumped her dry, and, after your magneto had been about 13 hours under water, it was found to be in perfect working order, and the engine started up without a hitch." MEA MAGNETO CO., LTD.,