VII. _Los acidos son malos para el pecho._—No class of remedies is in more general use in Lima than vegetable acids in the bilious disorders of daily occurrence; but in affections of the chest, whether simply catarrhal, or of the more serious forms of pneumonia or phthisis, it is a generally received and settled opinion that acids of all sorts are injurious, which they make known by such expressions as these: “Los acidos son malos para el pecho,”—acids are bad for the breast; “Los acidos cierran el pecho,”—acids shut up the breast. This opinion seems to have partly originated from a notion, once entertained by the doctors, that acids coagulate the animal fluids, and so produce obstructions and disease. It is made evident to our senses, that milk secreted from the blood is readily coagulated by acids; and thus they seem to conceive that something of the same process takes place in the circulating fluids of the body when acids are taken into the system. Not only the vulgar, but some of the professional characters, appear to be impressed with the notion that the blood is thickened or curdled by acids, whether mineral or vegetable; and that the delicate circulation of the lungs is consequently impeded, and the respiratory pores clogged. This opinion appears to be expressed in the very common remark, “El enfermo tomo fresco de lemon, y con el acido se le ha tupido el pecho,” which means that the patient drank cold lemonade, and with the acid the breast was stopped up. We are well persuaded that there are instances, especially among delicate females, where the respiratory organs are so susceptible of impressions, that the immediate refrigerating effects of cool acidulated drinks on the stomach of such persons extend rapidly, by sympathy, from the stomach to the surface of the body and lungs; and there produce a certain degree of constriction on the exhaling vessels, which disturbs their healthy action. It is only in this manner we can account for the fact, as frequently stated to us by patients, that, as certainly as they did take anything cool and acidulated, they were speedily affected with a tightness about the chest, and felt as if they had actually caught cold. On such occasions their usual observation was, “El acido me ha cerrado el pecho,”—the acid has locked or closely shut the breast. A complicated ailment which is vulgarly conceived to be seated in the chest, is often met with in Lima during the sultry months of January, February, and March. It is attended with a short and dry cough, a foul tongue, and evening fever, or restlessness, that chases away sleep. The patient becomes low-spirited and anxious; and dreads an approaching attack of consumption, or spitting of blood.