Description
As the final
The material they got on why the Needle was discovered was put in a 30 minute radio show
England in 1842
The River Lea and Stratford Bridge with a covered cart crossing
Robert Bate's hydrometer Pevensey As the finalA 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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