Experimental equipment to test electrical conductivity in a vacuum mb-height 4477 and the duty of the

and the duty of the Liberal Party

South elevation of the old St Paul's Cathedral

Formal photographic portrait of Thomas Lauder Brunton

figure 1 from the paper 'Observations on the structure of the stomachs of different animals

The Queen (centre) seen here with Princess Margaret

Experimental equipment to test electrical conductivity in a vacuum mb-height 4477 and the duty of thePlate 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