Complex and ever changing in its forms and functions, the element mercury follows a convoluted course through the environment and up the food chain. The process is complicated further by the fact that the difference between tolerable natural background levels and harmful effects in the environment is exceptionally small and still not completely und

Mercury Sources, Uses, Properties, Transport, Poisoning Mechanisms, and Treatment. Mercury Concentrations in Field Collections of Abiotic Materials, Plants, and Animals. Lethal and Sublethal Effects of Mercury Under Controlled Conditions. Case Histories. Proposed Mercury Criteria, Concluding Remarks, and Indexes.