Pair of seventeenth-century dividers
1600-1699
Steel dividers
Dividers with rack-and-pinion separation adjustment and micrometer screw
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
Panmetron, "universal scale" for measurement and calculation invented by James Jordan
1823
Patent protractor in form of set square
1885-1895
Semi-circular protractor
drawing instrument sets; dividers (compass)
Set of drawing instruments in mahogany case
Trigonometer serving as protractor and parallel rule
1902-1920
Brass protractor with two blades for setting out and measuring angles
1740-1749
Protractor and scale
Protractor, silver 2 1/16 inches diameter
1740-1760
Six inch protractor
Gunter's scale, early example, boxwood, 2' long
Gunner's rule incorporating Brigadier Borgard's Scale for English Weight & Foot Measure
Equarrimetre, form of rectangular protractor with sliding cursor
1918-1922
Semicircular rolling protractor rule
Geometrical pen
"Keith's Improv'd Scale"
Standard 6" diagonal scale in case; brass 6 7/8" x 3 7/16" screwed by 4 screws to mahogany base with a mahogany cover
Protractor with plummet clinometer
1876
Plotting scale
1876
Wooden scale ruler
1839-1865
Cased set of varnished card drawing scales by Holtzapffel & Co.
1839-1900
Rectangular protractor and plain scale
1800-1819
Circular protractor, engraved: 'Dollond London'
Marquois scales
Semicircular protractor
Pair of compasses in case
Circular protractor
Circular protractor 7 7/8 inch
1751-1773
Combination dividers
1772-1795
Gauger's scale; boxwood; 2 foot
1808-1844
Drawing pen for red ink
1876
Lithographic drawing pen
1876
Steel drawing pen
1876
"Best" patent enlarging and reducing scale made by W.F.Stanley
Steel dividers by W and C Wynn
1787-1899
Protractor scale
1876
Ivory protractor by Ross, London
1830-1859
Protractor scale
1876
Tripartite semi-circular protractor
1791-1859
Stanley's 5-inch improved drawing pen
1876
Stanley's 5 3/4-inch improved drawing pen
1876
Stanley's 5 3/4-inch improved drawing pen
1876