Improved saccharometer
1825-1835
Clarke's improved hydrometer
1792
Improved hydrometer with four weights
1815-1825
Electric incubator for laboratory use, London, England, 1901-1960
1901-1960
Early Sikes' hydrometer
1815-1825
Improved brewing hydrometer
1815-1825
Barktrometer for measuring the density of tanning liquor
1876
Clarke's import hydrometer
1795-1805
Small barktrometer in box
1876
Kitchen stove
1912
'Truth of God Church'
2004 (2005)