Boxwood Everard rule signed B. Martin
Parallel rule on brass mounts
Ivory rule
Two Wooden rules showing girth
Two double sided inscribed rules
1815
Boxwood rule
Mapmaker's quadrilateral rule
Boxwood rule by W.F. Stanley
Brass rule used in making planispheres and maps
1808
6" and a 12" No 350 stainless steel rule
Wooden foot rule, farmers staff
Section line ruler
4 ft. coachmaker's rule
Rule from Kew Pattern Unifilar Magnetometer
Slide rules
1790-1819
Metal Rule
Wooden rule of trigonometric functions
Hemmi 'Sun' (4-inch) slide rule
1950-1960
wooden rule
Rule, case and box for slide rule
Metal Rule
Conversion rule for shilling per quarter and foreign prices
Currency conversion rule inscribed "All Germany and Switzerland"
Near-point rule
Foot rule (folding to 3") with sliding brass calliper
circa 1827
Currency conversion rule for France, Spain, Portugal and Italy
Conversion rule for Amsterdam currency to others
One 2 ft. Patternmaker's rule 1867
1867
British alphabet written on a rule
6" bellmetal rule engraved "Joseph Whitworth
1850
Boxwood rule, with integral bass encased spirit level
Brass straight-edge, bevelled one side
1790-1819
Slide rule
1790-1819
Double folding rule
1790-1819
One two fold rule 2 ft
Two fold rule 18", with folding extension to 24”
1790-1819
Half-metre rule
1900-1983
BTM Rule for measuring number of cards in a pile
Atmospheric Diffusion slide rule in case, Met O Scientific Paper No 24, Met O 774 and inscribed 'tag'
A 9" Combination set of ,square, level protractor and rule
Half-metre rule
1900-1983
Half-metre rule
1900-1983