Monochromatic lamps and filtered spectra Size:XXL: 150 x 100cm Barbra Streisand

Barbra Streisand

Entomological studies of the Spur-legged stick insect Didymuria violescens

From the manuscript paper 'An account of a catoptric microscope'

set on snatching back the world heavyweight title for the fourth time in his incredible boxing career

better known as Twiggy

Monochromatic lamps and filtered spectra Size:XXL: 150 x 100cm Barbra StreisandFigures 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