Other causes besides climate tend to hasten the occurrence of this change, as habits, temperament, constitutional tendency, education, and idiosyncrasy. Habits of vigorous physical exercise tend to delay the access of puberty. For this reason, together with others, country boys and girls generally mature later than those living in the city by several months, and even a year or two. Anything that tends to excite the emotions hastens puberty. The excitements of city life, parties, balls, theaters, even the competition of students in school, and the various causes of excitement to the nervous system which occur in city life, have a tendency to hasten the occurrence of the change which awakens the sexual activities of the system into life. Hence, these influences cannot but be considered prejudicial to the best interests of the individual, mentally, morally, and physically, since it is in every way desirable that a change which arouses the passions and gives to them greater intensity should be delayed rather than hastened. Influence of Diet on Puberty.--The dietary has a not unimportant influence in this respect. Stimulating food, such as pepper, vinegar, mustard, spices, and condiments generally, together with tea and coffee, and an excess of animal food, have a clearly appreciable influence in inducing the premature occurrence of puberty. On this account, if on no other, should these articles be prohibited to children and youth, or used very sparingly. Those who advocate the large use of meat by children and youth have not studied this matter closely in all its bearings. While it is true that children and growing youth require an abundance of the nitrogenous elements of food which are found abundantly in beefsteak, mutton, fish, and other varieties of animal food, it is also true that in taking those articles of food they take along with the nutrient elements properties of a stimulating character, which exert a decidedly detrimental influence upon the susceptible systems of children and youth. At the same time, it is possible to obtain the same desirable nitrogenous elements in oatmeal, unbolted wheat flour, peas, beans, and other vegetable productions, which are wholly free from injurious properties. We are positive from numerous observations on this subject, that a cool, unstimulating, vegetable or farinaceous diet would deter the development of the sexual organism for several months, and perhaps for a year or two. While it might not be in all cases desirable to do this, it would at least be wise to adopt such measures in cases in which the child is unavoidably exposed to influences which have a tendency to hasten the change.