Early Sikes' hydrometer 6 1/2" long
1802
1802
1816
1900-1910
1927
1870-1930
1901-1910
1830-1860
1873
1900-1970
1820-1855
1930-1970
1860
1941
1840-1900
1850-1900
1830-1850
1840-1940
1840-1940
1860-1870
1901-1910
1830-1860
1870-1940
1870-1930
1850-1870
1820-1920
1930
1830
1896
1900-1950
circa 1823
1830
1957
1910
1900-1950