Pair of seventeenth-century dividers
1600-1699
Panmetron, "universal scale" for measurement and calculation invented by James Jordan
1823
Patent protractor in form of set square
1885-1895
Semi-circular protractor
Gunner's calliper in electrum and ivory
1816-1850
One of three 12 inch scales of equal parts by Elliott
One of three 12 inch scales of equal parts by Elliott
Rectangular drawing instrument in brass
1865
Callipers (c. 1800)
1800
Marquois universal parallel scale, 1796 or 1797
1796-1797
Trigonometer serving as protractor and parallel rule
1902-1920
Protractor and scale
Drawing pen for red ink
1876
Lithographic drawing pen
1876
Protractor, silver 2 1/16 inches diameter
1740-1760
Steel drawing pen
1876
"Best" patent enlarging and reducing scale made by W.F.Stanley
Gunter's scale, early example, boxwood, 2' long
Gunner's rule incorporating Brigadier Borgard's Scale for English Weight & Foot Measure
Pair of compasses in case
Geometrical pen
Stanley's 5-inch improved drawing pen
1876
Steel dividers
Stanley 5-inch lifting nib drawing pen
1876
Dividers with rack-and-pinion separation adjustment and micrometer screw
Rectangular protractor and plotting scale
1825-1830
Brass protractor with two blades for setting out and measuring angles
1740-1749
Six inch protractor
Equarrimetre, form of rectangular protractor with sliding cursor
1918-1922
Semicircular protractor
Circular protractor
Circular protractor 7 7/8 inch
1751-1773
Combination dividers
1772-1795
Gauger's scale; boxwood; 2 foot
1808-1844
Steel dividers by W and C Wynn
1787-1899
Protractor scale
1876
Semicircular rolling protractor rule
Ivory protractor by Ross, London
1830-1859
Protractor scale
1876
Tripartite semi-circular protractor
1791-1859
Stanley's 5 3/4-inch improved drawing pen
1876
Stanley's 5-inch improved drawing pen
1876
Stanley's 5 3/4-inch improved drawing pen
1876
Boxwood Sector, 1680-1720
1680-1720
Twelve - inch scale in case, by "Donkin, London"
Plotting scale
1876
Plotting scale
1876
Plotting scale
1876
Brass, 12-inch Gunter scale by Henry Sutton
1652
Plotting scale
1876