Frauhofer diffraction patterns generated through different apertures Size:M: 60 x 40cm photographed with his assistant Nicola

photographed with his assistant Nicola Bryant who plays Perpugilliam 'Peri' Brown outside BBC's Broadcasting House

Montalembert prepares to oblige

Baron Armstrong of Cragside was elected as a Fellow of the Royal Society in 1846

'The Man in Possession'

The British government had tried to retain a neutrality throughout the American Civil War

Frauhofer diffraction patterns generated through different apertures Size:M: 60 x 40cm photographed with his assistant NicolaIllustrations of optical phenomena: seven figures (numbered 135 141) of spectral distribution and intensity in Frauhofer patterns produced by white light shone through a variety of apertures, including circles. Plate 15 from the monograph 'Die Beugungserscheinungen aus den Fundamentalgesetzen der Undulationstheorie analytisch entwickelt und in Bildern dargestellt' [Diffraction in the fundamental laws of wave theory developed analytically and presented