indirectly causing sexual disease; hard physical and mental work are powerful correctives of the passions. It may be of interest to readers to know that but recently an association of American physicians, alarmed by the fearful prevalence of sexual diseases in this country, has been taking measures to inform youths and adults and the general public, through special instruction in schools, and by means of pamphlets and lectures to teachers and others, of the prevalence and great danger of this evil. When young adult life has been attained it is also desirable for the parent, or the family physician, to inform the young man or woman--especially if either is about to enter a marriage engagement--that close and frequent personal contact with the opposite sex, especially when the affections are involved, will necessarily, though involuntarily, excite local stimulation of the sexual organs and general irritability and exhaustion of the entire nervous system. Long engagements--when the participants are frequent companions--are thus peculiarly unfortunate. It is only when the sexual functions are normally exercised in adult life, as in sexual intercourse, that sexual excitement is not harmful. Young women about to marry should receive instruction from their mothers as to the sexual relations which will exist after marriage. Most girls are allowed to grow up ignorant of such matters and in consequence may become greatly shocked and even disgusted by the sexual relations in marriage--fancying that there must be something unnatural and wrong about them because the subject was avoided by those responsible for their welfare. Any excess in frequency of sexual intercourse after marriage is followed by feelings of depression and debility of some sort which may be readily attributed to the cause and so corrected. Any deviation from the natural mode of intercourse is pretty certain to lead to physical disaster; thus, unnatural prolongation of the act, or withdrawal on the part of the man before the natural completion of the act in order to prevent conception, often results in deplorable nervous disorders. In conclusion, it may be said that parents must take upon themselves the burden of instructing their children in sexual hygiene or shift it upon the shoulders of the family physician, who can undertake it with much less mental perturbation and with more intelligence. Otherwise they subject their offspring to the possibility of incalculable suffering, disease, and even death--largely through their own inexcusable neglect. CHAPTER II =Genito-Urinary Diseases= _Contagious Disorders--Common Troubles of Children--Inflammation of the Bladder--Stoppage and Suppression of Urine--Causes and Treatment of Bright's Disease._