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Parallel rule, 18 inch, ebony and brass ordinary p

Mathematics

1876
Parallel rule, 6-inch, ivory and electrum, ordinary pattern, (single parallelogram)

Parallel rule, 6-inch, ivory and electrum, ordinar

Mathematics

1876

Rolling parallel rule by Dollond with enamel dial

Mathematics

Sliding parallel rule:- 3 foot, by William Cary, L

Mathematics

Mechanical parallel rule, brass, in pine case

Mathematics

Parallel rule, rectangular brass frame with steel

Mathematics

1731-1770

Parallel rule, 6-inch, ivory, rolling type

Mathematics

1876

Rolling parallel rule by Cooke, Troughton and Simm

Mathematics

1922-1950

Rolling rule for typewriter spacing, French patent

Mathematics

Parallel rule in bakelite signed `Lund's Rule, Pat. Nov. 2.20'

Mathematics

1922-1927

Parallel rule, 18 inch, metal, rolling type, edge

Mathematics

1876

Parallel rule, 18 inch, wood, rolling type

Mathematics

1876

Parallel rule, 18 inch, wood and ivory, scales on

Mathematics

1876

Parallel rule, 6-inch, ivory and electrum (double

Mathematics

1876

Parallel rule, 18 inch, metal, rolling type

Mathematics

1876

Thirteen-arm parallel rule, probably French, mid 1

Mathematics

1840-1860

Field's parallel rule,18-inch boxwood and brass. "

Mathematics

1876

Rolling parallel rule by Elliott Bros

Mathematics

1870-1910

Boswell's parallel rule, stamped "Banks, 441 Stran

Mathematics

1805-1830
Rolling parallel rule by Stanley in brass. `LCC WD No.12' engraved on instrument and stamped on mahogany box., made at Great Turnstile, Londoon

Rolling parallel rule by Stanley in brass. `LCC WD

Mathematics

1900-1930
Rolling rule with 30cm scale and protractor made by Shinomo, plastic, overprinted Club Panoly Resort Hotel, Boracay, Philippines

Rolling rule with 30cm scale and protractor made b

Mathematics

1980-1990
Naval parallel rule, c. 1885, by John Bliss & Co., patented (No.224,962) in the USA by Charles D. Sigsbee in 1880

Naval parallel rule, c. 1885, by John Bliss & Co.,

Mathematics

1882-1887
Parallel Rule, Japanese, signed `T.Tamaya. Tokyo', with an engraved anchor above Japanese characters(3), steel, 21 inches overall, with one arm divided every degree, in a fitted wooden box, the lid marked with the anchor and Japanese characters

Parallel Rule

Mathematics