Calculating rule by Lenoir in centimetres with conversions
1800-1830
AVRO Shackleton Centre of Gravity Computer
1950
Slide rule by Robert Bissaker
1654
AviatJet 647 Aristo Air Navigation Computer.
1970-1975
Faber-Castell Slide Rule
1920
Ronchetti linear slide rule
circa 1847
Circular Calculator
1900
Slide rule for calculation of treadwheel labour
1823
Circular slide rule by Troughton and Simms
1877
Sheppard's cubing slide rule, boxwood
1876
Nestler Slide Rule for Chemists
Lord's Calculator
1880-1885
Dipstick and Slide Rule
1850-1870
Cook Slide Rule
1825-1834
Slide Rule
1960-1965
Unique Electrical Slide Rule
1935-1950
Fowler "Jubilee Magnum" Scale Calculator
1948
Fowler Vest Pocket Calculator
1950-1955
British Thornton Slide Rule
1967-1975
Fowler's "Magnum" Calculator
1938-1943
"Calculex" Circular Slide Rule
1908
Hydraulic Slide Rule
1970-1975
PIC Slide Rule
1950
Welsh's slide rule for Mass of air
1869-1885
Welsh's slide rule for psychometric observatiosn
Boxwood slide rule
1860-1880
Pilot balloon slide rule Mark IVA, Met Ref No 868A, MO 2792/56, in pine wood case
1956
Welsh's slide rule, for Magnetic observation
M.O. humidity slide rule MK VI
1960
Pilot balloon slide rule Mk II
1940
Pilot balloon slide rule Mk IVA
1965
Atmospheric Diffusion slide rule in case
Harrier "Jump Jet" take off and landing slide rule
1970-1980
"Otis King's" cylindrical slide rule for calculating percentages
circa 1950-1965
Two wooden slide rules with identical scales
Bate's sliding scale
Box-wood slide rule
Slide-rule, 12-inch, boxwood
1713
Leather case for Slide-rule
1713
11-Inch slide rule
1800-1900
Temperature and pricing slide rule by J.Long
1860-1870
Comparative or reducing slide rule
1840-1850
Boxwood Slide Rule; made by Dring and Fage
Wooden slide rule with plastic cursor and printed scales by Lawrence Engineering
1950-1965
Helix Modern maths U07 Log-Log (10-inch) slide rule
1970-1975
Temperature slide rule
1830-1840
wooden slide rule
wooden slide rule
