Perkins, Henry, 1803-1889, publisher, Haswell, Barrington, and Haswell, printer, McManus-Young Collection (Library of Congress) DLC · Philadelphia : H. Perkins, 134 Chestnut Street · leaf 114
ipjmiiin w&^mm.n ^.sr® ,&ssaB COLOURED FLAMES. S S^J <<sg^ r^x VARIET Y of rays of light is exhibited by coloured\ 7? v^- ::^} flames, which are not to be seen in white light.\20*s,;^v^rf/f) Thus, pure hydrogen gas will burn with a blue, : ~\ flame, in which many of the rays of light…
Scientific recreations
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