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ADVERTISMENTS
NESTLER'S SLIDE RULES
OBTAINABLE FROM ALL DRAWING OFFICE
MATERIAL DEALERS
STANDARD TYPE, in well-seasoned wood, with celluloid facings screwed on. 5in., 8in., 10in., 15in., 20in. and 24in.
THE RIETZ SLIDE RULE enables cubes and cube roots to be read off directly and logarithms to be found quickly and accurately without using the slide. 10in., 15in. and 20in.
THE PRECISION SLIDE RULE— a 20in. rule in a length of lOin. Gives results to within 0.03 per cent, and a corresponding accuracy with the other scales.
THE UNIVERSAL SLIDE RULE, 10in., allows all the usual operations to be performed; gives cubes and cube roots directly, and enables various tacheometrical calculations to be readily effected.
THE FIX SLIDE RULE, 10in. All the usual operations can be performed and the area and cubic contents of round bodies determined in a very simple manner.
CLOSELY DIVIDED 5in. POCKET RULE, with magnifying cursor (full-size illustration on side).
CONSTRUCTIONAL IMPROVEMENTS
ELASTIC STRIPS which are let into the sides of the stock ensure smooth and even movement independent of atmospherical Influences.
The stock, being covered with CELLULOID on both TOP and HOTTOM, cannot warp, as wood and celluloid ten differently affected by climatic changes. ALL CELLULOID SCALES are screwed on to the wood.
WHOLESALE DEPOT:
A. FASTLINGER
30 Snow Hill, LONDON, E.C.
