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For much of the industrial era, asbestos was a widely acclaimed benchmark material. During its heyday, it was manufactured into nearly three thousand different products, most of which protected life and property from heat, flame, and electricity. It was used in virtually every industry from hotel keeping to military technology to chemical manufacturing, and was integral to building construction from shacks to skyscrapers in every community across the United States. Beginning in the mid-1960s, however, this once popular mineral began a rapid fall from grace as growing attention to the serious health risks associated with it began to overshadow the protections and benefits it provided. In this...
This book covers the major aspects of phylogeny and reproductive biology of frogs in chapters written by major authorities. Topics treated are: anuran phylogeny, classification and reproductive modes; gross anatomy of the reproductive system; oogenesis; endocrinology of reproduction; spermatogenesis and the mature spermatozoon; breeding glands; int
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The animals loosely termed fish constitute more than half of all known vertebrate species. There are approximately 27,000 described living species of bony fishes (Euteleostomi = Osteichthyes), about 70 species of hagfishes and some 34 species of lampreys. Approximately 970 species are chondrichthyans, the sharks and their relatives, which were the