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The first drawing of a stethoscope (1819) [6] A modern stethoscope Laennec is said to have seen school children playing with a long piece of solid wood in the days leading up to his innovation. [ 7 ] The children held their ear to one end of the stick while the opposite end was scratched with a pin, the stick transmitted and amplified the scratch.
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The spirit of medicine, as imagined by Salomon Trismosin, 1582. The Caduceus became a symbol of alchemy and pharmacy in medieval Europe. Its first appearance as a medical symbol can be traced back to 1st−4th century CE in oculists' stamps that were found mostly in Celtic areas, such as Gaul, Germany and Britain, which had an engraving of the name of the physician, the name of the special ...
This logo image consists only of simple geometric shapes or text. It does not meet the threshold of originality needed for copyright protection, and is therefore in the public domain . Although it is free of copyright restrictions, this image may still be subject to other restrictions .
Two sun dogs often flank the Sun within a 22° halo. The sun dog is a member of the family of halos caused by the refraction of sunlight by ice crystals in the atmosphere. Sun dogs typically appear as a pair of subtly colored patches of light, around 22° to the left and right of the Sun, and at the same altitude above the horizon as the Sun ...