Fuller slide rule manual

This rule consists of an outer wooden cylinder that slides up and down and rotates. Two brass rings lined with felt are inside this cylinder. The cylinder is covered with paper marked with a single spiral logarithmic scale graduated into parts and having a length, according to the maker, of inches (nearly 42 feet). Slide Rules. In , John Napier discovered the logarithm which made it possible to perform multiplications and divisions by addition and subtraction. ie: a×b = 10 (log (a)+log (b)) and a÷b = 10 (log (a)-log (b)) This was a great time saver but there was still quite a lot of work required. The mathematician had to look up two logs, add them together and then look for the number . The slide rule depicted inside the manual is Dietzgen's "National," model , and the manual was received with Detailed instructions are provided for reading the scales, multiplication, placing the decimal point, division, proportion, squares and square roots, cube and cube roots, trigonometry, and www.doorway.ruted Reading Time: 7 mins.

The Stanley firm made about 14, Fuller's spiral slide rules over nearly one hundred years. According to Boyd's Directory of the District of Columbia, Fred A. Schmidt, vendor of draftsmen's supplies, moved from 9th Street N.W. to 9th Street, with a branch at Pennsylvania Avenue, between and Description. This is the U.S. patent model for a cylindrical slide rule invented by George Fuller (–), a British civil engineer and professor of engineering at Queen's College, Belfast. Fuller received patents in Great Britain (no. ) in and in the United States in W. SLIDE RULE MANUAL No. - Lyman M. Kells, Willis S Kern, and James R. Bland, - , , DORIC Nos. Plastic Slide Rules - - Manual for first release of the released as DORIC Slide Rule - - Manual for the version of the

Pickett Slide Rules are available with all of the special scales shown in this manual. COPYRIGHT · PICKETT, INC. Form M PART 1. SLIDE RULE OPERATION. Police Whistle Good home wanted for STANLEY'S FULLER CALCULATOR SLIDE RULE No 2 Bakelite Brass logarithmic scale. Complete with stand ORIGINAL instruction. Cylindrical instruments, got far greater length by wrapping the scale in a spiral around a cylinder. Fuller Calculator. This Fuller Calculator made in England.