Catoptric microscope Benjamin Disraeli Interior view of the Hall

Interior view of the Hall of Commerce

Below Napoleon are the rocks of revolution

Coining press and dies from the Tower of London

'Petrowski'

Catoptric microscope Benjamin Disraeli Interior view of the HallView of a microscope shown on a pedestal stand: with a section through the instrument, a scheme of its optical arrangement and details of the mirror based instrument. The microscope was inspired by the Newtonian reflecting telescope. From the manuscript paper 'An account of a catoptric microscope', by Robert Barker. Not signed. Royal Society Register Book Original, vol. 19 1734 1736, pp. 256 260. The paper was read before the Royal Society on 8