BRIGHT POLISHED FIGURES AND BEADED EDGES, WITH DEAD BLACK BACK GROUND. Send for particulars of my new COMBINED TOURING PLATE (Reg.) Telegrams: "KRANKASES," ISLING, LONDON. Telephones: 3846 City. 4879 Central. Coan Casts Clean Crank Cases ON ADMIRALTY AND WAR OFFICE LISTS. ROBERT W. COAN, _THE ALUMINIUM FOUNDRY,_ 219, GOSWELL ROAD, E.C. [Illustration: THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS] WOLSELEY LIGHT Aero Motors 60 H.P. and 120 H.P. (water cooled). 60-80 H.P. (combined air and water cooled.) Catalogue free on application to THE WOLSELEY TOOL AND MOTOR CAR Co., Ltd. Proprietors: VICKERS, Limited, ADDERLEY PARK, BIRMINGHAM. "Geographia," Ltd. 33, STRAND, W.C. SPECIALISTS IN AVIATION ACCESSORIES. Alexander Cross - ANTI-DRIFT COMPASS " " - BEARING FINDER " " - MAP CASE "GEOGRAPHIA" BAROGRAPHS and HEIGHT RECORDERS. MAPS FOR AVIATORS DRAWN TO ORDER. AVIATION MAPS FROM AERODROME TO AERODROME ALWAYS IN STOCK. ASK FOR ILLUSTRATED PRICE LIST. Telegraphic Address:--"Geografo, London." Telephone 4965 City. =G. H. Cox & Co., Ltd.= CASTLE ROAD, SOUTHSEA, :: HANTS. :: LARGEST GARAGE IN :: THE SOUTH OF ENGLAND. [Illustration: HOYT METAL CO. LONDON THE FORMER UNREGISTERABLE BRAND ICE - INTERNAL COMBUSTION ENGINE REG. LINING METAL HOYT METAL CO. COPPER HARDENED. HAS BEEN ABANDONED TO IMITATORS.] TRIAL INGOTS CHEERFULLY SUPPLIED. RECENT||RECORDS: A.B.C. (AERO) 45 H.P. ENGINE--8 HRS. 23 MIN. TALBOT 25 H.P. CAR--103-3/4 MILES IN 1 HOUR. PEUGEOT 30 H.P. CAR--106-1/5 MILES IN 1 HOUR. DIE-CAST BEARINGS FOR REPETITION WORK. THE HOYT METAL CO. OF GREAT BRITAIN, LIMITED. 26, BILLITER STREET, LONDON, E.C. TWO IMPORTANT BOOKS ON AVIATION. 180 Pages, with Diagrams. Crown 8vo. ~3s. 6d.~ net. THE AVIATION POCKET BOOK for 1913. Containing amongst other valuable information, the Theory and Design of the Aeroplane, Structural Material, Examples of Actual Machines, &c., &c. By R. BORLASE MATTHEWS, A.M.I.C.E., M.I.E.E., _Member of the Royal Aero Club_. CONTENTS: Air Pressure and Resistance--Aeroplane Theory and Design--Structural Materials--Engines--Examples of Actual Machines--Piloting and Aerial Navigation--Meteorological Data--Military Information and Signalling--Aero Clubs and Societies--Glossary of Terms used in Flying. Extract from Reviews: "_... a large amount of information is included in these various chapters and the diagrams and curves used to illustrate the texture some of the plainest and most easily understood that we have ever seen in a book of this class ... generally speaking the data given would appear just such as are not contained in other books of reference._"--Engineer. "_The Book is one which we are sure many will find useful and convenient._"--Engineering. Popular Edition. 294 pages. 95 Illustrations and Dimensioned Drawings. Demy 8vo. cloth 5s. net. THE ART OF AVIATION.