Millington, John P. (1906). John Dalton. стр. 72,77–78.
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J. B. van Helmont, Ortus medicinae. … (Amsterdam, (Netherlands): Louis Elzevir, 1652 (first edition: 1648)). The word "gas" first appears on pp. 58, where he mentions: "… Gas (meum scil. inventum) …" (… gas (namely, my discovery) …). On pp. 59, he states: "… in nominis egestate, halitum illum, Gas vocavi, non longe a Chao …" (… in need of a name, I called this vapor "gas", not far from "chaos" …)
