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The article discusses the highlights of the summer meeting on freshwater ecology at Exeter held by the British Ecological Society on July 3-7, 1964. It was held at the University of Exeter in Devon, England, by invitation of Professor L. A. Harvey and the university authorities. H. Gruffydd's paper entitled "The Population Biology of Chaetogaster limnaei" pointed out there were morphological and behavioral differences between a form of Chaetogaster limnaei living in the kidney of Lymnaea pereger and a form living on the outer surface of this snail.

The article presents a reprint of the research paper which appeared in the Tweed Commissioners Annual Report for 1972 released in April 2, 1973. The paper reflects the results of the study on the growth of the 500 hatchery reared tagged brown trout with an average fork length of 25.0 centimeters which were released into the River Tweed, Scotland on March 29, 1972.

The article discusses the highlights of a meeting of the Tropical Group held in the rooms of the Linnean Society in London, England, on November 4, 1964. The meeting discussed the pattern in dry tropical vegetation. Papers presented are "Pattern in Acacia-Capparis Semi-Desert Scrub in the Sudan," by P. Greig-Smith, "Termites and their Influence on Vegetation in the Drier Areas of Africa," by W. V. Harris, and "Vegetation Arcs in Somalia," by C. A. H. Hodge.

The article presents the research paper which reflects on methods used by the Freshwater Biological Association to reduce the number of pike in Lake Windermere, England. Pikes reduced the food for the trouts, which are the most important fishes in the lake. The study found out that the long lining method caught more pikes but also eels and trout which could not be returned alive.

The article presents a preliminary study about some of the chemical features of a peat profile. The study analyzed samples taken from a peat profile on the Leven estuary in North Lancashire, England. These samples were examined for their conductivity, redox potential, ash-alkalinity, calcium content, and iron content. Some of the elements and chemical properties in the exchange of a peat profile and the relationship between the variations in these properties and the vegetational composition of the peats are discussed.

The article reports on the recolonization at the upper margin of the sublittoral region of a part of Wembury Bay, South Devon, England. The research showed that the upward-facing sublittoral rock surfaces were populated by a forest of large brown seaweed, such as Saccorhiza bulbosa, Laminaria Cloustoni, Laminaria digitata, and Himanthalia lorea. No changes were seen in the motile fauna in this area, which could correlate with the changes in the algal vegetation. The author concludes that sessile organisms, which finally were established, eliminated their predecessors by occupying all the space available for anchorage.

The article features the life and works of scientist John Dalton. The child of an English weaver, Dalton started his teaching career in a village school at the age of twelve. By diligent self-study, he became eligible to teach and then become principal of a boarding school at Kendal. In 1793, he was invited to teach in the department of mathematics and natural philosophy of New College, later known as Manchester College, Oxford. Six years later when the college was moved to York, he resigned, supporting himself thereafter by tutoring. He conducted his experimental research in a study and laboratory provided by the Manchester Philosophical Society of which he was in succession a member, secretary and president.