The phenomena of Asthma arises from increased excitement of the branches of the eighth pair of nerves, distributed over the larynx, and the internal membrane of the wind-pipe, and bronchiæ, brought on by a certain condition of the atmosphere, probably with respect to electric matter: for, opposite states of the air, with regard to its temperature, density, or humidity, do not disorder asthmatic subjects, so much as easterly or north-easterly winds. In consequence of the excitement of the nerves of the larynx, &c., the respiratory muscles, particularly those which perform the functions of expiration, become affected by spasms, whereby the free admission of the irritating air into the lungs is promoted. This is manifest by the excessive paroxysms, very similar to that which ensues on an attack of Asthma, which immediately follows an artificial irritation, the membrane of the larynx. The suffocating sensation produced by a morsel of food lodging in the membrane in the act of swallowing (usually attributed by unprofessional persons to “the food going the wrong way,”) is of this nature. The muscles concerned in expiration immediately contract, to prevent the admission of an obnoxious article into the wind-pipe; and this state of muscles will continue many minutes: and, in asthmatics, whose nerves of the parts are morbidly irritable, it has continued many hours. It would be incompatible with the design of this pamphlet, and perhaps superfluous to enter minutely into a description of what Asthma is—especially as no disease shows itself more distinctly. The individual, occasionally attacked by wheezing, difficulty of breathing, and tightness of the chest, need not be assured that he is asthmatical; but it will be a source of consolation to inform him, that his case is really curable, by this valuable medicine, as experience in the worst cases has amply confirmed. As the use of the Balsam is persevered in, the paroxysms abate, the attendant cough becomes freer, and is accompanied by gentle expectoration; and, in proportion to the increase of the cough and expectoration, the distressing symptoms decrease—a more free passage of air being now admitted to and from the lungs. Some individuals are continually asthmatic, and others are subject to it only occasionally, when it comes on in fits: this remedy will be found intrinsically valuable to such, because it will loosen the tough phlegm, which oppresses the lungs and produces shortness of breath, and cause its removal by expectoration.