No. 7 in **E.191.6 Herschel, Sir John Frederick William, bart.
On the absorption of light by coloured media, and on the colours of the prismatic spectrum exhibited by certain flames ...
Edin. Neill. 1823. (2), 16 pp. Plate. 4°. From the Trans. of the Royal soc. of Edin. 1822. [**E. 163.1. 9].
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