A decompression procedure for repetitive diving to depths of 190 feet was devised employing modified Haldane principles which have been reported previously. The

Provides a comprehensive overview of the U.S. coal industry over 20 years, with emphasis on the major changes that occurred, their causes, and their effects. Pr

SCUBA is a fun, relaxing, educational, interesting, and -- if approached properly -- safe activity, it is nonetheless a sport that has risks. SCUBA diving is in