Ullage Slide Rule (dated 1780)

1780

Ullaging slide-rule

Nine inch Ullage and casting rule

1850-1860

Ham's Ullage rule

1880-1885

Ham's combined ullaging and proof rule

1870-1899

Ullage Slide Rule (c. 1820)

1820-1825

12" Ullage Slide Rule (c. 1870)

1845-1882