Monochromatic lamps and filtered spectra Sir John Musgrave 5th August 1992

5th August 1992

and the city must surrender soon

Cassius Clay (Muhammad Ali) in Central London a few days before his fight with Henry Cooper

spilling gravy over one of them while his attention is distracted by a woman with her child on his other side

Monochromatic lamps and filtered spectra Sir John Musgrave 5th August 1992Figures showing monochromatic lamps fuelled by alcohol diluted in water to produce a yellow flame (figures 1 3), with views of the effects on the spectrum created by filtering light through various types of coloured glass (figure 4 numbers 1 16). Plate 28 from the paper 'Description of a monochromatic lamp for microscopical purposes, &c. with remarks on the absorption of the prismatic rays by coloured media.', by David Brewster, originally published