![](https://coimages.sciencemuseumgroup.org.uk/506/873/large_thumbnail_1983_7584.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/506/873/large_thumbnail_1983_7584.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/334/74/large_thumbnail_smg00049547.jpg)
German hexagonal section measuring rod, one of four
1695-1715
![](https://coimages.sciencemuseumgroup.org.uk/404/171/large_thumbnail_2019_208_1.jpg)
Ruler, plastic
![](https://coimages.sciencemuseumgroup.org.uk/480/289/large_thumbnail_smg00250837.jpg)
Ruler
1875
![](https://coimages.sciencemuseumgroup.org.uk/480/62/large_thumbnail_smg00250521.jpg)
Halden Ruler
1870-1900
![](https://coimages.sciencemuseumgroup.org.uk/480/67/large_thumbnail_smg00250527.jpg)
A.G. Thornton Folding Ruler
1890-1910
![](https://coimages.sciencemuseumgroup.org.uk/480/288/large_thumbnail_smg00250836.jpg)
Thornton 12-Inch Rule
1960-1965
![](https://coimages.sciencemuseumgroup.org.uk/124/845/large_thumbnail_cd0716_027_131126_2009_44_3_1_ruler.jpg)
Gardner diesel engines Branded ruler
circa 1954-97
![](https://coimages.sciencemuseumgroup.org.uk/124/846/large_thumbnail_cd0716_028_131126_2009_44_3_2_ruler.jpg)
Gardner diesel engines Branded ruler
circa 1954-97
![](https://coimages.sciencemuseumgroup.org.uk/643/686/large_thumbnail_smg00249629.jpg)
Dancer Ruler
1860-1870
![](https://coimages.sciencemuseumgroup.org.uk/644/182/large_thumbnail_smg00250814.jpg)
Ruler
1860-1880
![](https://coimages.sciencemuseumgroup.org.uk/316/423/large_thumbnail_smg00043660.jpg)
Swedish measuring ruler, 28 5/8" long
![](https://coimages.sciencemuseumgroup.org.uk/479/577/large_thumbnail_smg00249627.jpg)
Ruler
1955-1965
![](https://coimages.sciencemuseumgroup.org.uk/479/576/large_thumbnail_smg00249626.jpg)
Steel Rule
1900
![](https://coimages.sciencemuseumgroup.org.uk/644/14/large_thumbnail_smg00250515.jpg)
Ruler
1939
![](https://coimages.sciencemuseumgroup.org.uk/644/20/large_thumbnail_smg00250520.jpg)
Ruler, used by Beyer
1930
![](https://coimages.sciencemuseumgroup.org.uk/644/13/large_thumbnail_smg00250514.jpg)
Ruler
1917
![](https://coimages.sciencemuseumgroup.org.uk/480/281/large_thumbnail_smg00250829.jpg)
Twelve inch ruler
1872
![](https://coimages.sciencemuseumgroup.org.uk/313/779/large_thumbnail_smg00046486.jpg)
Sectional ruler
1900-1910
![](https://coimages.sciencemuseumgroup.org.uk/495/619/large_thumbnail_1987_8472_0002.jpg)
Box of "engine divided" rulers
![](https://coimages.sciencemuseumgroup.org.uk/507/80/large_thumbnail_smg00266593.jpg)
Ruler, wooden, marked 'Armstrong'
![](https://coimages.sciencemuseumgroup.org.uk/480/65/large_thumbnail_smg00250524.jpg)
Ruler
1870-1900
![](https://coimages.sciencemuseumgroup.org.uk/477/296/large_thumbnail_smg00246634.jpg)
Twelve-Inch Ruler
1930-1940
![](https://coimages.sciencemuseumgroup.org.uk/476/707/large_thumbnail_smg00245789.jpg)
Folding rule
1885-1895
![](https://coimages.sciencemuseumgroup.org.uk/124/847/large_thumbnail_cd0716_029_131126_2009_44_3_3_ruler.jpg)
Gardner diesel engines Branded ruler
circa 1954-97
![](https://coimages.sciencemuseumgroup.org.uk/124/848/large_thumbnail_cd0716_030_131126_2009_44_3_4_ruler.jpg)
Gardner diesel engines Branded ruler
circa 1954-97
![](https://coimages.sciencemuseumgroup.org.uk/479/562/large_thumbnail_smg00249612.jpg)
Ophthalmic Rule
1935-1945
![](https://coimages.sciencemuseumgroup.org.uk/316/422/large_thumbnail_smg00043653.jpg)
Swedish measuring ruler, 26 7/8" long
![](https://coimages.sciencemuseumgroup.org.uk/367/580/large_thumbnail_smg00114188.jpg)
'Days to check 2000' ruler marketing 'Check 2000' tool
1999
![](https://coimages.sciencemuseumgroup.org.uk/334/76/large_thumbnail_smg00049549.jpg)
German hexagonal section measuring rod, one of four
1715
![](https://coimages.sciencemuseumgroup.org.uk/334/75/large_thumbnail_smg00049548.jpg)
German hexagonal section measuring rod, one of four
1695-1715
![](https://coimages.sciencemuseumgroup.org.uk/334/77/large_thumbnail_smg00049550.jpg)
German hexagonal section measuring rod, one of four
1695-1715
![](https://coimages.sciencemuseumgroup.org.uk/479/580/large_thumbnail_smg00249631.jpg)
Thornton Ruler
1920-1930
![](https://coimages.sciencemuseumgroup.org.uk/643/735/large_thumbnail_smg00249723__0001_.jpg)
Ruler
1949
Ebony ruler, Great Western Railway
1833-1858
Three ivory rulers
Ebony rule
Ebony ruler
Boxwood Ruler, Great Northern Railway
Wooden 18" ruler, British Railways
Ruler, Great Northern Railway
1857
Cardboard Ruler, London & North Western Railway
Timetable slide ruler
Wooden ruler, Great Western Railway
Ruler from Phase 3 Novavax 2019nCoV-302 Vaccine Trial
2020