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Head rod

1808-1815

Excise officer's slide rule

Excise slide rule

1836-1900

Ullage Slide Rule (dated 1780)

1780

Ullaging slide-rule

Nine inch Ullage and casting rule

1850-1860

Verie or Excise officer's slide rule

Modified form of Revenue Verie slide rule

1860-1870

Slide rule

1810-1820

Excise officer's slide rule by W. Rix

1740-1746

Ham's Ullage rule

1880-1885

Ham's proof rule

1855-1865

Excise officer's slide rule in boxwood

Excise Officer's slide rule in boxwood

1801-1830

Reducing and comparative slide rule, for Excise Officer

1821-1846

Slide rule, with two double-sided sliders, for Excise Officer

Proof Rule (c. 1840)

1840-1845

Ullage Slide Rule (c. 1820)

1820-1825

12" Ullage Slide Rule (c. 1870)

1845-1882

Excise slide rule of Verie type in boxwood (stock 91/2 in)

12" Proof Slide Rule (c. 1870)

1845-1882
Excise Officer's slide rule, 1" x 5/8" x 12", with two sliders on opposite faces, engraved "T.C." on stock under one of the sliders

Excise Officer's slide rule

Gauger's slide rule by Dring and Fage, 18th Century

Gauger's slide rule by Dring and Fage

1790-1800
Excise officer's slide rule, boxwood, 12" long, with four slides, inscribed "Edwd Roberts maker in Dove Court in Old Jewry London", in leather case

Excise officer's slide rule

1759-1769
Three Excise Officer's slide rules, (boxwood), 2 about 1 feet long, and the third 9" long, each rule has four slides, one on each face of the rule

Mechanical counter for fluid meters, 1881.

Gauger's slide rule, made by Cock, 9 5/16" x 2" x 1/4", boxwood, slides 10" long, with 5-foot gauging rod in 6 parts, all in cloth case (imperfect)

Gauger's slide rule

1835-1845