1926 | Prymnesium |
1927 | Gomphosphaeria, |
1928 | Porphyridium, |
1929 | Uroglena volvox |
1930 | Herbarium Image: Mimulus luteus |
1931 | Herbarium Image: Nitella opaca |
1932 | Herbarium Image: Nitella opaca |
1933 | Herbarium Image: Potamogeton perfoliatus |
1934 | Herbarium Image: Oenanthe fluviatilis |
1935 | Nostoc, |
1936 | Herbarium Image: Potamogeton crispus |
1937 | Trentepohlia, |
1938 | Herbarium Image: Potamogeton gramineus |
1939 | Prymnesium |
1940 | Soil moisture data: AC0101, Nottinghamshire, 2008 |
1941 | River Piddle P2 Spring 2008 |
1942 | Melosira, |
1943 | Scenedesmus, |
1944 | Rhodochorton (Audouinella), |
1945 | Herbarium Image: Alisma plantago-aquatica |
1946 | Gomphosphaeria, |
1947 | Syngenta Pond Invertebrate Data (2004) |
1948 | Gomphosphaeria, |
1949 | Daily nitrous oxide flux measurements: AC0111, Oxfordshire, 2010-2011 |
1950 | Front cover of An Illustrated Guide to Aquatic and Water-Borne Hyphomycetes (Fungi Imperfecti), with Notes on their Biology |