Submarine Appliances And Their Uses
Deep Sea Diving, &c., &c.

OBJECT OF THIS BOOK. ACKNOW- LEDGMENTS. Dr. Haldane and his Colleagues. Dr. Hill’s work. Admiralty. Dr. A. E. Boycott, M.D., M.A., and Lieut. G. C. C. Damant, R.N. INTRODUCTION. THE chief purpose of this book is to ensure the safety of the diver and the caisson sinker who work at great depths. It is hoped, however, that the information given may also prove useful to the submarine worker whose duties are confined to the more ordinary depths, such as are met with in Harbour, Dock and Bridge building operations, etc. Much of the data given in the following pages is the result of original researches made on behalf of the British Admiralty by Professor J. S. Haldane, M.D., F.R.S., of Oxford University, to whom, and his colleagues Dr. A. E. Boycott, M.D., M.A., and Lieut. G. C. C. Damant, R.N., for their splendid work in connection with the preventive treatment of caisson disease, the gratitude of all engaged in deep diving and compressed air operations is due. We are also indebted to Professor Leonard Hill, M.B., F.R.S., of the London University Medical College, who has made many original and important researches into the effects of deep diving on the human system. For special permission to reproduce the chapter on "The Physics and Physiology of Diving,” we are indebted to the Lords Commissioners of the Admiralty. Our acknowledgments are also due to Dr. A. E. Boycott, M.D., M.A., and Lieut. G. C. C. Damant, R.N., from whose joint paper on “influence of Fatness on Susceptibility to Caisson Disease" we have quoted. 5