Chincough, or Hooping-cough, a contagious disease, which at first resembles a common cold, though it is from its commencement attended with a difficulty of breaming ; and the eyes are protruded from their sockets. It generally attacks children ; to whom, if mismanaged, it frequently proves fatal. Those who breathe an impure air, live upon poor sustenance, or are indulged in large potations of warm tea, and do not enjoy sufficient exercise, are most subject to this convulsive cough, in its utmost severity. Hence the necessity of parents to pay unremitting attention to those circumstances which aggravate the complaint.— But, if the cough become so violent that respiration is occasionally suspended, and when the patient breathes again, is accompanied with a shrill hooping noise, no time should be lost to remove him to a different air, whether it be more or less pure, provided it is at some distance from his former residence. The diet in this disorder should always be light, but nourishing; and if no fever prevail, white meat may be allowed in very moderate quantities, so as to divide the usual dinner into three or four different portions, and to give neither cold nor hot drinks, but toast and water, with a little white wine, of which the chill is taken off; gruel; de-coctions of sago, tapioca, arrow-root, etc. If the cough be attended with febrile symptoms, medical advice should be procured ; but in ordinary cases we would advise a gentle emetic, made of an infusion of chamomile flowers, gradually administered ; and afterwards to apply the following liniment to the pit of the stomach: Take one scruple of tartar emetic, dissolve it in two ounces of spring water, and add half an ounce of the tincture of cantharides. This embrocation was originally prescribed by Doctor STRUVE, and has, from experience, been found of superior efficacy to the patent or quack medicines advertised in the daily papers. A tea-spoonful of it ought every hour to be rubbed on the lower region of the stomach, with a warm piece of flannel; and the wetted part should likewise be covered with flannel. A gentle previous vomiting, how. ever, is necessary to promote the absorption of the liniment.

In the beginning of the hooping-cough, especially after a change of air, great advantage has often been derived from the application of the juice of onions, horse-radish, or other stimulants, to the soles of the feet. - See Blister.