But if the best health possible is to be enjoyed by everybody, the co-operation with the physician must include everybody. Already a considerable and increasing number of men and women understand this. If they have any reason to suspect organic weakness of any kind, they have recourse to the physician's advice, to the end that a suitable regimen, or a less exacting mode of livelihood, may forefend all threatened harm. A few pages of this volume set forth the due care of the eyes: the work from which those pages is taken gives hints of equal value regarding the care of the ears, the lungs and other bodily organs, so much more easily kept sound than restored to soundness after the assail of disease. GEORGE ILES. CONTENTS PAGET, SIR JAMES, M.D. ESCAPE FROM PAIN. THE HISTORY OF A DISCOVERY About 1800 Humphry Davy experimented with nitrous oxide gas and suggested its use in surgery. Horace Wells, a dentist of Hartford, Conn., uses the gas for the painless extraction of teeth. Sulphuric ether also observed to produce insensibility to pain. Dr. Crauford Long, of Jefferson, Ga., uses it in 1842 for the excision of a tumour. Wm. T. G. Morton, Boston, employs ether in dentistry, and Dr. Warren in surgery. Dr. Simpson, Edinburgh, introduces chloroform to prevent the pains of childbirth. Anæsthesia not only abolishes pain, it broadens the scope of surgery and makes operations safe which formerly were most perilous. 3 BENNETT, SIR J. R., M.D. JENNER AND PASTEUR Jenner's indebtedness to John Hunter. Jenner's early observations in natural history. He hears a countrywoman say, "I can't take small-pox for I have had cow-pox." This sets him thinking. He finds that of various forms of cow-pox but one gives protection against small-pox. In 1796 successfully vaccinates a patient. Holds that small-pox and cow-pox are modifications of the same disease and that if the system be impregnated with the milder disease, immunity from the severer is conferred. Immense saving of life by vaccination. Pasteur, a chemist, studies fermentation, which is due to the rapid multiplication of organisms. Similar organisms he detects as the cause of the silkworm disease and of anthrax in cattle. He adopts the method of Jenner, prepares an attenuated virus and protects cattle from anthrax. 25 GEDDES, PATRICK, AND J. ARTHUR THOMSON PASTEUR AND HIS WORK Distinguishes minute facets, not before observed, in certain chemical compounds. Proves that the fermentation of tartrate of lime is due to a minute organism and that a similar agency underlies many other kinds of fermentation. Protects wine from fermentation by heating it for a minute to 50° C. Disproves the theory of spontaneous generation. Discovers an antitoxin for hydrophobia. 51