Subject: Major Gunter’s Field Sketching Protractor From: "Dr.B.A.Coghlan" Date: Wed, 21 Jun 2017 18:49:29 +0100 To: coghlan@cs.tcd.ie http://www.mathsinstruments.me.uk/page35.html ----------------------- Two military sketching protractors with scales of shade for slopes dating from the late 19th century. The upper one is by Elliott Bros and is ivory. The lower one, mainly boxwood with an inset of a white material, is a Major Gunter’s Field Sketching Protractor for which the design was registered in 1885. It was retailed by the Army & Navy Cooperative Society. The shading was intended to be used on maps sketched in the field to indicate the degree of slope. It seems to have been a fairly short lived system, at least so far as the scale appearing on protractors is concerned, since it does not appear on the ‘\New Service Protractor” of ca. 1900 vintage that was the first standard design of service protractor, replaced by the AII about the time of WWI ----------------------- Note the change in telephone code 608->896 ************************************************************** * _/_/_/_/_/ _/_/_/ __/_/_/_/ Dr.B.A.Coghlan * * _/ _/ _/ _/ _/ Dept.Computer Science * * _/ _/ _/ _/ Trinity College Dublin * * _/ _/ _/ _/ tel : (+3531).8961766 * * _/ _/ _/ _/ _/ fax : (+3531).6772204 * * _/ _/_/_/ __/_/_/_/ email : coghlan@cs.tcd.ie * **************************************************************