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Aviation History
1941
1941 - 0654.PDF
14 Advertisements MARCH 2OTH, 1941 f-m r-v * Ji-M "(pt-; THE moment you startusing a TURQUOISE Pencil you'll appreciate its superlative smoothness. The easy flow of line from its smoother lead makes for swifter, more e«for$£ss drawing. To ensure chat they remain satin-smooth to the last inch, TURQUOISE leads are impregnated with a blend of rare wa^es until every microscopic particle of graphite glides on a film of lubricant. Accurate grading, exceptional point strength and perfect blue printing quality, are other advantages that will delight you. Please write on business heading for FREE SAMPLE SET, stating degrees required and name of your usual supplier. WHY TURQUOISE ARE BETTER The lead in every pencil bearing our Registered Trade Mark "Ou/mi-Sealed is covered with an impervious film (patented process) to which glue adheres perfectly, thus bonding lead and wood into a single unit so strong that point- breakage is normally impossible. / DRAWING PENCILS 5d. EACH 4/8 DOZEN (including tax). From your usual supplier. MADE IN ENGLAND BY EAGLE PENCIL COMPANY, LONDON, N.I7 17 DEGREES: 6B. 5B. 4B. 3B. 2B. B. HB. F. H. 2H. 3H. 4H. 5H. 6H. 7H. 8H. 9H. ELECTRICAL EQUIPMENT for AIRCRAFT fitted to many well-known types of machines • • • Other BTH products include:— Turbo-alternators ; heavy electric plant; rectifiers ; switch- gear ; transformers; industrial motors and control gear; industrial heating equipment; Fabroil pinions; Mazda, Mercra, and Sodra lamps; aerodrome, industrial, public, and A.R.P. lighting; photo-electric, electron tube, and many other devices. BTH Ask BTH for advice on all industrial lighting problems! THE BRITISH THOMSON-HOUSTON COMPANY LIMITED. RUGBY. ENGLAND AZ970N
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