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- [24] Studies of photo-synthesis in fresh-water alg ae. - l. The fixation of both carbon and nitrogen from the atmosphere to form organic tissue by the green plant cell. 2. Nutrition and growth produced by high gaseous dilutions of simple organic compounds, such as formaldehyde and methylic alcohol. 3. Nutrition and growth by means of high dilutions of carbon dioxide and oxides of nitrogen without access to atmosphere. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-CONTAINING PAPERS OF A BIOLOGICAL CHARACTER, 1920, 91 (638) : 201 - 215