| Description | In reference to Williamson's letter of the 28th, the papers Williams refers to on carbon dioxide in the Berlin Berichte and Paris Comptes Rendus are as under; W C Williamson 'Die Menge der in der Atmosphäre vorhandenen Kohlensäure' 1897, and M Henriet, 'Dosage rapide de l'acide carbonique dans l'air et les milieux confinés', 1896. Both these may be purchased from Messrs Dulau & Company, 37 Soho Square, W. |