Ruler

Technical Information

Catalogue No: C0799
Category: Personal/Personnel
Object Type: Stationery/Office Items
Object Name: Ruler
Part No: ?
Serial No: ?
Manufacturer: Elliott Bros
Division: Unknown
Platform(s):
Year of Manufacture: 1877
Dimensions:
Width (mm):
309 
Height (mm):
Depth (mm):
37 
Weight (g):
Location: Archive Object Store
Inscription(s):

?

Notes:

This 12inch Boxwood Scale Rule marked Elliott Bros London on one face and the other side is marked W.H.U.Smith.

The Rule Measures:-
Length, 12- 5/32" Width, 1- 7/16" and Thickness 3/16"

The centre front {side with maker name} of one Scale is marked: 45 & 35, and the other side marked 20 & 40.

This Rule is part of a set of Marquois Scales which would have comprised this Rule, another 12 inch rule with scales marked for 25/50 and 30/60 and a usual triangle.

"Marquois scales were devised by a captain of that name c. 1780 for use with his system of surveying for military purposes. Equidistant parallel lines could be drawn with speed and accuracy using his special plain-edged scales together with a triangle. The triangle easily recognizable since it has two plain and one bevelled edge, is set with angles of 222" and 67," and has two sides marked with an index matrix. Sets of these special Marquois scales continued to be made throughout the nineteenth century."

Click to enlarge Click to enlarge Click to enlarge