Planimeter, by Stanley
1901-1950
Fuller calculator
Allbrit compensating polar planimeter
1969-1976
Amsler planimeter
1901-1950
Allbrit fixed bar compensating polar planimeter with weighted arm
1954-1956
Magazine case of drawing instruments
Allbrit radial planimeter for chart measuring
1956-1958
Railway surveyor's drawing curves by Stanley
Allbrit sliding bar compensating polar planimeter with enclosed reading scale
1974-1976
Spiral slide rule for complex numbers by Stanley with bakalite handle
1960-1965
![Allbrit [rule-form] linear planimeter](https://coimages.sciencemuseumgroup.org.uk/340/651/large_thumbnail_smg00051742.jpg)
Allbrit [rule-form] linear planimeter
1974-1976
Large Allbrit sliding bar compensating polar planimeter for exhibition with weighted arm in wooden case
1937-1939
Allbrit fixed bar compensating polar planimeter with weighted arm
1955-1960
Fuller's spiral logarithmic slide rule in mahogany box
Balloon theodolite by Cary
Barnard's Co-ordinate spiral slide rule
1909
Map measurer with 10 paper dials
1876
Barnard's Co-ordinate Calculator
1919
Compasses and dividers (58 pieces on board)
1876
Field's parallel rule
1876
Parallel rule
1876
Boxed set of drawing curves
1920-1930
Parallel rule
1876
Pantograph in enamelled brass with 32-inch arms
1940-1950
Lithographic drawing pen
1876
Compasses and dividers
1876
Allbrit sliding bar compensating polar planimeter with weighted arm
1946-1948
Allbrit square root radial planimeter with pivot bolt for measuring charts from Ranarex carbon dioxide recorder
1955-1957
Protractor scale
1876
Section pen
1876
Ten test bars for use with polar planimeters
1955-1970
Steel drawing pen
1876
Isograph
1876
Parallel rule
1876
Parallel rule
1876
Parallel rule, 6-inch, ivory, rolling type
1876
Protractor scale
1876
Beam compasses
1876
One curve (guide) pen
1876
Drawing pen for red ink
1876
Slide rule with two slides, boxwood
1876
Point, one of three, for enlarged sectional compass dividers
1876
Allbrit rule-form linear planimeter with magnifier and hand magnifier
1964-1966
Allbrit rule-form linear planimeter with magnifier and hand magnifier
1957-1959
Allbrit fixed index compensating polar planimeter with the wrong weighted arm
1974-1976
Specimens illustrating construction of drawing instruments
1876
Tubular beam compasses
1876
Pilot balloon slide rule Mk II
1943
Allbrit sliding bar compensating polar planimeter with weighted arm
1969-1971
Proportional compass
1876