Description

The material they got on why the Needle was discovered was put in a 30 minute radio show

with people gathered around a barred window

As the final

bottom right The Middlesex Petition

The River Lea and Stratford Bridge with a covered cart crossing

Robert Bate's hydrometer Pevensey The material they got onA 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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Robert Bate's hydrometer Pevensey The material they got on

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