The separation of the most volatile gases from air without liquefaction.

• Published in: Proceedings of the Royal Society of London
• Main Author: Dewar, James
• Format: Article in Journal/Newspaper
• Language: English
• Published: The Royal Society 1905
• Subjects: Carbonic acid
• Online Access: http://dx.doi.org/10.1098/rspl.1904.0095; https://royalsocietypublishing.org/doi/pdf/10.1098/rspl.1904.0095

From the time when liquid air came to be an ordinary laboratory agent, I have continually used it for the purpose of producing high vacua in vessels that had been previously filled with easily condensable gases, like sulphurous acid, carbonic acid, vapour of water or benzol. When the liquefaction of hydrogen was effected one of the first scientific uses to which it was put was that described in my paper on the “Application of Liquid Hydrogen to the Production of High Vacua, together with their Spectroscopic Examination.”