260. Ním bark is a valuable astringent tonic, and when dried and reduced to powder, may be given in doses of one drachm three or four times a day. A better form, however, is a decoction prepared by boiling two ounces of the bruised inner layer of the bark in a pint and a half of water for a quarter of an hour, and straining whilst hot; of this, when cold, the dose is from 2 to 3 ounces. It, as well as the Powdered Bark, is a remedy of considerable value in _Ague or Intermittent Fever_; and in these cases it should be given every second hour previous to the time at which the attack is expected to return. It is chiefly adapted for mild, uncomplicated cases, especially in natives. _For Convalescence after Fevers_, _General Debility_, and _Loss of Appetite_, the Decoction, in somewhat smaller doses than those mentioned above, proves of great service, and its efficacy is increased and its taste improved by the addition of a few bruised Cloves or a little Cinnamon. As the decoction readily spoils in hot weather, it should be prepared fresh for use when required. 261. _To Indolent and Ill-conditioned Ulcers, especially those of long standing_, a poultice of Ním leaves acts beneficially as a stimulant. It is easily prepared by bruising a sufficient quantity of the fresh leaves with a little tepid water, and applying it, spread on a rag, to the ulcerated surface; should it cause pain and irritation, as it sometimes does, an equal weight of rice flour may be added. 262. +Nitre, Saltpetre, Nitrate of Potash.+ Shórá (_Hind._, _Duk._, _Punj._), Sórá (_Beng._), Saféd-shora (_Kash._), Pot-luppu (_Tam._), Peti-luppu, Shúrá-karam (_Tel._), Veti-uppa (_Mal._), Pet-luppu (_Can._), Shóra-mítha (_Mah._), Sóro-khár (_Guz._), Pot-lunu, Vedi-lunu (_Cing._), Yán-zin (_Burm._), Sun-dawa (_Malay_). In Kashmir the term Shorá means Gunpowder, hence one must speak of White Gunpowder (_Saféd Shorá_), which is the name of Nitre, if it is wished to procure it. (Dr. Aitchison.) 263. Nitre is obtainable in most of the bazaars of India, but often in a very impure state. To fit it for internal use it should be purified by dissolving it in boiling water, removing the scum after the liquid has been allowed to settle, straining the solution through calico and setting aside to crystallise. Pure specimens, which are sometimes met with in large bazaars, should be in white crystalline masses or fragments, colourless, and of a peculiar, cool, saline taste.