Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 224
Fig.112. stands an ordinary Bunsen burner, which, as you know,is a gas jet having openings at the foot to let atmospheric-air mix with the gas. It gives a smokeless blue flamevery different from the ordinary bright flame of gas.Though very hot, this flame radiates out but little light,neither does…
Light · X-rays
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