Ullage and casting slide rule, mid 19th century
1831-1870
Portable Sikes' hydrometer by Dring and Fage
1873
Sikes' Revenue Hydrometer, 1816-1873.
1816-1873
Three gilt Tate saccharometers by Dring and Fage
1961
Folding Timber Slide Rule (c. 1860-1870)
1860-1870
Cartier hydrometer, scale 10-45.
Twaddell's No. 1 hydrometer, scale 0-24.
Six's thermometer, 1876.
1876
Sikes' Hydrometer, English, 1903-1938
1903-1938
Four foot gauging rule
1804-1844
Hydrometer, by Dring and Fage
1801-1900
Improved saccharometer
1825-1835
Improved hydrometer with four weights
1815-1825
Oleometer in box
Set of Sikes' Standard Hydrometers, 1940-1950
1940-1950
Clarke's Alcohol Hydrometer, 1767-1800
1804-1844
Clarke's improved hydrometer
1792
Sikes' Hydrometer (c. 1860)
1860
Clarke hydrometer in case with collars and weights
1840-1920
Coulson's slide rule
1876
Clarke's Hydrometer (dated 1813)
1813
Circular slide rule in brass
1878-1882
Brass latex hydrometer by Dring and Fage
circa 1950
Improved Sikes' Hydrometer by Dring and Fage
1830
Verie or Excise officer's slide rule
Saccharometer hydrometer
Set of 5 brass Tralles' hydrometers with a Gay-Lussac hydrometer
1900-1950
Boxwood Slide Rule; made by Dring and Fage
Open range brass Sikes' hydrometer by Dring and Fage
1900-1950
Dring and Fage saccharometer in box
Brass Buss saccharometer
1851-1900
Timetable or rent rule
1840-1850
Burt's Slide Rule for reducing superficial measurements to inches
1887 patent
Three silver (probably plated) Tate saccharometers by Dring and fage
1900-1950
Improved brewing hydrometer
1815-1825
Gilt Sikes hydrometer by Dring and fage
1867
Rope gauge with brass calliper slide
1855-1865
Timetable or rent rule, 1850-1860.
1850-1860
Tree height measurer, British, 1900-1905
1900-1905
Twaddell's No. 5 hydrometer, scale 102-138.
Dring and Fage Slide Rule, boxwood and ivory
1820-1860
Nickel-silver salinometer
Oiliometer, 1870
1870
Twaddell's No. 4 hydrometer, scale 74-102.
Ivory slide rule with two slides
Wollaston's chemical slide rule, c 1820.
1820
4 ft Gauging Rod (c. 1850)
1850-1855
Barktrometer for measuring the density of tanning liquor
1876
Clarke's export hydrometer in box.
Ewart's cattle gauge with ivory slide and cursor by Dring and Fage
1903-1910