


Parallel rule
1876

Gunner's calliper in electrum and ivory
1816-1850

Glover's sector
1839-1850

Isograph
1876

Tubular beam compasses - 3 draw; 12" long when closed
1876

Samuel Russell's Patent bi-centrolinead No.24 by Patrick Adie
1848-1886

Tubular beam compasses
1876

Ellipsograph, ebony and electrum
1852-1859

Froude-pattern proportional dividers
1862-1900

2-Foot Rule
1855-1865

Beam compasses
1876

Statue of Imhotep, Egypt, 600-500 BCE
600-500 BCE

Excentrolinead, length of ivory scale = 6 inches
1876

Six portable beam heads: 2 plain points
1876
Opisometer by Elliott Bros.
Three Bennett patent geometric compasses with cases and specimens of work on boards
Farey's centrolinead, with weight, made by W.F.Stanley and Company, London
1876