File:Auroscope (inspector auris), cross section, 1825 Wellcome L0035325.jpg

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Auroscope (inspector auris), cross section, 1825
Title
Auroscope (inspector auris), cross section, 1825
Description

Auroscope (inspector auris) in cross section. Designed and drawn by Thomas Buchanan. Key to components: A) Globular lantern of block tin, with a large door on one side. B) Iron tube, inside polished and secured to lantern. C) Shorter tube made to screw on the end of the tube B. a) Double convex lens, about 3 inches focus, and 3 inches diameter. b) Concave lens to collect rays emitted by d, and transmit them to a, its focal distance the same as a. c) Double convex lens less diameter than a, concentrates the rays at a distance of about 7-8 inches from its surface. d) Candlestick equidistant from a and b. e) Head of lantern, with small oblique holes to let out candle smoke. f.f.g) Pieces of tin prevent rays escaping in these directions. h) Piece of iron into which tube B is fixed. i) Standard made of iron. Bottom is circular and about a foot in diameter. See also L0035326.

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Keywords: Auroscope; Instruments; Ear; Examination; Thomas Buchanan
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