We specialise in Light Machine Tools for use in portable workshops, such as are used in connection with aircraft. The above is a photograph of a Travelling Workshop equipped with our 5 in. lathe and Radial Drill, both of which tools are fitted with treadle and electric motor drive. Full particulars of machines and installations furnished on application. [Illustration: 5 in. Centre Screw Cutting, Surfacing and Boring Lathe here shewn, with counter shaft for power. With counter shaft or treadle drive. Price L44.] [Illustration: Light treadle driven Radial Drill, taking up to 1 in. drills (1/2 in. shank.) This machine is of special design, a patented form of high speed drive giving ample power for drilling by foot. With treadle and fast and loose pulley. Price L24 15s.] Also 4 in., 3-1/2 in., 6 in., 7-1/2 in., 9 in. lathes, etc. _DRUMMOND BROS. LTD., REDE WORKS,_ GUILDFORD, SURREY. 'Phone 153, Guildford. Telegrams: "Lathes, Stoughton." "TEL" REVOLUTION SPEED INDICATORS. Approved and used by the British Admiralty. Owing to its conjugate movement it is accurate, possesses a uniform graduated dial and is not affected by vibration or variation of temperature. Indicates with the same accuracy high and low speeds. Independent of variable strains, friction. Not damaged should maximum speed of dial be exceeded. Rain and dust-proof. Requires no upkeep or adjustment of mechanism. [Illustration] Tel. 431 Victoria. THE HASLER COMPANY, 26, Victoria St., Westminster, LONDON, S.W. C.A.V. is the ~proved~ system of electric Lighting for Cars. The consistent reliability and efficiency of the C.A.V. Lighting Sets is vouched for by the owners of the 15,000 cars on which the system has been adopted. It is essentially the "no trouble" system; simple, safe and certain. Send for our illustrated Blue Book, fully explanatory and free. _C. A. VANDERVELL & Co._, WARPLE WAY, ACTON VALE, LONDON, W. Telephones: 1234 {Chiswick {(5 LINES) Telegrams: "Vanteria," London. Whiteman & Moss, Ltd. 15, BATEMAN STREET, DEAN STREET, W., LONDON, England. Telephone Gerrard 6824. Telegrams: Whitomoss {Premier. Codes {Lieber. {A.B.C. 5th Edition. =Speciality=: WIRE STRAINERS, EYEBOLTS, FERRULES, ETC. SCREWED WORK FOR ALL PURPOSES. Accuracy & Promptitude SPECIALITE de Passoires en toile metallique. de tire-fonds, de Viroles, etc. Objets filetes en tous genres. PRECISION et RAPIDITE. THE LEADING AIRCRAFT BUILDERS ALL use the "INCANTO" (LOW PRESSURE) OXY-ACETYLENE WELDING APPLIANCES. SOLE MANUFACTURERS THORN & HODDLE ACETYLENE CO. L^{TD}. 151 VICTORIA S^T. LONDON, S.W. INSURANCE. The Primus Aviation Policy at Lloyd's OFFICIALLY APPROVED BY THE ROYAL AERO CLUB. For Advice on:-- AVIATION, LIFE, PERSONAL ACCIDENT, 3rd PARTY, EMPLOYERS' LIABILITY, MOTOR, and all Classes of Insurance communicate with