Pair of seventeenth-century dividers
1600-1699
"Keith's Improv'd Scale"
Panmetron, "universal scale" for measurement and calculation invented by James Jordan
1823
Patent protractor in form of set square
1885-1895
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
Semi-circular protractor
Plotting scale
1876
A.G. Thornton Drawing Set
1890
J. Halden Drawing Set
1895-1910
Wooden scale ruler
1839-1865
Brass reduction compass for setting out lines in proportion
Cased set of varnished card drawing scales by Holtzapffel & Co.
1839-1900
Rectangular protractor and plain scale
1800-1819
Circular protractor, engraved: 'Dollond London'
Semicircular protractor
Pair of compasses in case
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
Circular protractor
Protractor and scale
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
Protractor, silver 2 1/16 inches diameter
1740-1760
Steel drawing pen
1876
"Best" patent enlarging and reducing scale made by W.F.Stanley
Six inch protractor
Steel dividers by W and C Wynn
1787-1899
Gunter's scale, early example, boxwood, 2' long
Protractor scale
1876
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
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-inch improved drawing pen
1876
Stanley's 5 3/4-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
Gunner's calliper in electrum and ivory
1816-1850