The boy's own book of indoor games and recreations : a popular encyclopædia for boys (1890)
Stables, Gordon, 1840-1910, Hutchison, George Andrew, 1841-1913 · Philadelphia : J.B. Lippincott · leaf 524
collar, shown in Fig. 3, where the central bar is the tubeleading up to the source of smoke. There are other ways of producing smoke rings. For instance, rings such asshown in Fig. 4 are produced during the combustion of phosphuretted hydrogen,tiie white vapours of the phosphoric acid rolling up…
Games · Amusements
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