Description
'Beeston Castle in Cheshire'
A bed and door mat seller
Sir George Grey
Formal photographic portrait of Thomas Lauder Brunton
The Queen (centre) seen here with Princess Margaret
Experimental equipment to test electrical conductivity in a vacuum mb-height 4477 'Beeston Castle in Cheshire'Plate 9 figures 1 2 from the paper 'Electrical experiments made in order to ascertain the non conducting power of a perfect vacuum', by William Morgan, Philosophical Transactions of the Royal Society, vol. 75 (1785), pp. 272 278. Figure 1 shows a 15 inch mercury gauge partially coated with tin foil, emptied of air and inverted into a mercury cistern. A wire is visible within this reservoir, through which an electrical current was passed but without
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