326. _In Tic Douloureux and Rheumatic Faceache_, Sal Ammoniac occasionally proves very useful. Two drachms in six ounces of water should be taken in divided doses (1½ ounce for a dose), every four hours, till relief is obtained: if the pain does not yield after the four doses, no benefit can be expected from persevering with it. _Other forms of Neuralgia_, as _Sciatica_ and _Lumbago_, have also been found to yield to it, when administered early in the attack. 327. _In Chronic Rheumatism, especially when the muscles are mainly affected_, Sal Ammoniac, in doses of 15 to 24 grains, with infusion of Country Sarsaparilla (163), proves highly serviceable; but it is even more effectual in relieving those _Muscular pains of the Chest_ and other parts of the trunk so often met with in the overworked and underfed portion of the working classes in large cities. In these cases it requires to be persevered in for some time. 328. _Hysterical, Nervous, and Bilious Headaches_ are often greatly benefited, or disappear altogether, under the use of this salt in doses of 10 to 20 grains twice or thrice daily, dissolved in Camphor Julep. The earlier in the attack it is given, the greater are the chances of its proving effectual. 329. _In Chronic Coughs, especially in those of old age_, a mixture of a drachm of Sal Ammoniac, two ounces of syrup of country Liquorice (6), and four ounces of Water, in doses of one ounce five or six times a day, occasionally proves serviceable. In doses of from 1 to 5 grains, according to the age of the child, conjoined with a few grains of powdered Cinnamon, it has been found useful in _Hooping Cough_; it is inferior in efficacy to Alum, but may be commenced with safety and advantage at a much earlier period in the attack. 330. _In Hæmorrhage from the Lungs, Stomach, and other Internal Organs_, it is worthy of a trial if other more effectual agents are not at hand. In these cases, two drachms should be dissolved in a pint of _conjee_ water, and a wineglassful given every second or third hour, according to the severity of the case. The patient should be kept quiet, cool, and in the recumbent posture.