{|align=center width=350 cellpadding=2px style="font-size:85%;border-collapse:collapse;line-height:95%;" |colspan="2"|

|- |width="190" style="vertical-align:text-top;padding-left:2em; text-indent:-2em;text-align:justify;font-variant:small-caps;"|Fig. 1.—Tube with Singing-Flames showing Mechanism by which the Gas-Jets are made to diverge, and thus give rise to the Sound. |width="190" style="vertical-align:text-top;text-align:center;font-variant:small-caps;"|Fig. 2.—Same, with Flames united, when no Sound is produced. |}