1892 The flowing bowl when and what to drink (1892, c1891)

COMPOSITION OF DRINKS, ETC.

54

monia, nitric and nitrous acids, shows generally an impurity of the water this being contaminated by filth from cesspools and other sources. Water, by various methods, may be rid of much of its injurious matter, although a thorough purification through charcoal or oxide of iron will secure water pure enough for use; nor will it lose much of its taste. For special purposes, for use in hospitals, it is advisable to boil the and by the taste easily distinguishable, amount of salts, are used mostly for therapeutical purposes, some of them because be- ing palatable and refreshing also instead of ordinary drinking water. We have to dwell only on the latter ones to which belong those having but a few of solid ingredients and dissolved carbonic acid gas, not under 40 vol. per cent, as f. /., Apollinaris, the waters of Heppingen and Dorotheenauer Spring at Carlsbad, etc.; likewise the waters containing alkalies and alkalic muriatic acids with a certain quantity of natrium bi- carbonicum and chloride of natrium, besides freely dis- solved carbonic acid gas are frequently used as table waters, as those of Vichy, Giesshuebel, Rodna, Ems, Selters, etc. The waters are either consumed at the springs or bottled; preparations containing their active ingredi- ents, like the pastilles of Bilin, the Carlsbad Salt, etc., is out of question. Filtering /. z., water first, to cool it, and to add, artificially, carbonic acid gas. Spring waters, which have a large,