Simmance Patent Flicker Photometer 820 H
  • Simmance Patent Flicker Photometer 820 H
  • Simmance Patent Flicker Photometer 820 H
  • Simmance Patent Flicker Photometer 820 H
  • Simmance Patent Flicker Photometer 820 H
  • Simmance Patent Flicker Photometer 820 H

Simmance Patent Flicker Photometer 820 H

Stock Number: 150510

£180

Dimensions

Maximum dimention excluding stand 6

Circa

1915

Country of manufacture

UK and Ireland

Category: Physics & Chemistry

Description

An oxidised and lacquered brass, mahogany cased SIMMANCE PATENT FLICKER PHOTOMETER, circa 1915 Adjustable speed clockwork mechanism complete with winding key, prism and lenses. In excellent conditiom and good working order. Original pillar mounted on later cast iron stand. ********************************* Photometers of the flicker type are of particular use where it is necessary to compare the intensities of two sources of light, as light enters at each side of the photometer. The distance between the photometer and one of the sources of light can be adjusted (ie you move the light) until the two light sources appear equally bright when viewed through the photometer. The ratio of the intensities from the distances from each light to the photometer can then be calculated.

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GB Cog Scientific

As a fine art sculpture graduate I have applied my appreciation and understanding of form and function to my lifelong professional career in the antiques trade. Over forty years dealing in what I considered worthy, within the fields of decorative arts and sciences, I have always purchased over a wide spectrum and look forward to offering an exciting variety of stimulating pieces.

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