Time and again an unhappy frame of mind exaggerates or prolongs the vomiting of pregnancy. Thus, disappointment, anxiety, grief, fright, and other types of mental uneasiness not only magnify the discomfort but sometimes are its sole cause. The curious cases in which the husband suffers from nausea while his wife is pregnant are explained by mental influences. As a result of the same kind of influence, women who imagine themselves to be pregnant often suffer from violent vomiting, which ceases as soon as they discover their error. On the other hand, women who for several months remain ignorant of the fact that they are pregnant rarely suffer from sick stomach. Any kind of worry may be and often is the direct cause of the vomiting of pregnancy, though patients are often unwilling to confess it; and occasionally do not seem to know what it is that troubles them. In any event, having received the assurance of her physician that there is nothing serious the matter, the prospective mother who is annoyed by nausea should make every effort not to become self- centered. She should have congenial companionship and should interest herself in pursuits outside of, as well as within, her home. Of all the measures that may be employed to overcome this manifestation of pregnancy the most fundamental and essential is mental diversion. HEARTBURN.--Obviously, it would not be fair to consider indigestion as one of the ailments peculiar to pregnancy, for anyone is liable to suffer from indigestion. Yet dyspeptic symptoms, more especially heartburn and flatulence, occur so frequently at this time that something should be said regarding their causation and treatment. A burning sensation rising from the stomach into the throat, familiarly called heartburn, is generally due to an overabundant secretion of hydrochloric acid, which is, as we have learned, a normal constituent of the gastric juice. Of late, the conditions which influence its secretion have been the subject of laboratory investigation, which has disclosed, among other interesting facts, the way to _prevent_ heartburn. These experiments have taught that the introduction of fat into the stomach shortly before a meal decreases the amount of acid secreted during digestion. Consequently, anyone who is troubled by heartburn and wishes to avoid it _should take a tablespoonful of olive oil, a cup of cream, or a glass of rich milk fifteen or twenty minutes before meal-time_. On the other hand, fatty food eaten with the meals prolongs the stay of food in the stomach and causes an increase in the secretion of hydrochloric acid. An excess of the acid, as we have just learned, is favorable to the development of heartburn. Therefore, as a further precaution against this source of discomfort, it is advisable not to use a large amount of butter or of salad oil, and to refrain from fried food, rich desserts, or any other article of diet known to contain a relatively large amount of fat.