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

Barktrometer for measuring the density of tanning liquor

1876

Clarke's import hydrometer

1795-1805

Early Sikes' hydrometer

1815-1825

Improved brewing hydrometer

1815-1825

Small barktrometer in box

1876

'Truth of God Church'

2004 (2005)

Kitchen stove

1912