Description
bottom right The Middlesex Petition
England in 1842
with people gathered around a barred window
The River Lea and Stratford Bridge with a covered cart crossing
Three quarter length studio portrait of Peter William Barlow seated with his right hand resting upon a table
Robert Bate's hydrometer Pevensey bottom right The Middlesex PetitionA hydrometer with hinged wooden case manufactured by Robert Bate. Hydrometers are used to measure the density of liquids. The weighted end is placed into a liquid and the hydrometer sinks to a certain level. The specific gravity can then be read from the liquid level on the vertical scale. ca. 1836
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