XI. LIQUID COMPOUNDS. 325 



Marble in coarse powder i oz., add muriatic acid, diluted with 

 l-3rd its wejcrht of water, by degrees, until the marble is dis- 

 solved, collecting the eras: produce about 1 gallon. In small 

 doses sedative ; externally used in cancer and fetid ulcers. 



FUMIGATIONS. 



Nitrous fumigation, Fumigatio nitrosa, Sal. nitri 3iv, ol. 

 vitrioli ij : in a saucer placed upon hot sand in the middle of 

 the room. 



Disinfecting fumigation, Fumigatio oxymuriatica. Sal. 

 comm. 3 oz., black manganese 1 oz., oil of vitriol 1 oz., water 

 a oz : in a cup carried through the apartments, or they may be 

 shut up for an hour or two, and then opened. 



Powders for making effervescent mixtures, pastilles for burning, 

 and the like, act by the gas they produce ; but they are referred 

 to the forms in which the materials arc sold. 



XI. LIQUID COMPOUNDS. 



NOT OILY. 



I DISTILLED WATERS. 



MK of these are intended for medical purposes, mostly as 

 vehicles, others for perfume. In respect to medicines, no great 

 care is usually judged necessary, the herb just as collected, with- 

 out any separation of decayed parts, or accidental mixture of dirt 

 or other substance, is added to the water, distilled in a short- 

 necked, wide still as quickly as possible, and i^pirit of wine 3ij, or 

 even more, added to each ])int. Many do not even take this 

 trouble, but rub a drop or two of the oil, with a little magnesia, 

 and add it to common water, or dilute the oil with ten times as 

 much spirit of wine, and add, when it is wanted, a few drops of 

 this essence to the water or other vehicle. 



But for perfumes, as rose water, elder-flower water, &c., more 

 care is requisite, as the buyers must be pleased with their smell 

 and appearance ; hence the herb, &c., must be carefully picked, 

 and the waters as carefully distilled in a high narrow-necked still, 

 in order that no part of the infusion may be thrown over with the 

 distilled water, as this would render them liable to become 

 mothery in a short time ; if a superior article is required, the 

 waters must be redistilled by a gentle heat. 



