The Edinburgh new dispensatory ... including complete ... translations of the ... London pharmacopoeia, published in 1791; Dublin pharmacopoeia, published in 1794; and of the new ed. of the Edinburgh pharmacopoeia, published in 1803 ... / [Edited, with extensive alterations and additions] By Andrew Duncan, jun.

  • Lewis, William, 1708-1781
Date:
1803
Catalogue details

Licence: Public Domain Mark

Credit: The Edinburgh new dispensatory ... including complete ... translations of the ... London pharmacopoeia, published in 1791; Dublin pharmacopoeia, published in 1794; and of the new ed. of the Edinburgh pharmacopoeia, published in 1803 ... / [Edited, with extensive alterations and additions] By Andrew Duncan, jun. Source: Wellcome Collection.

    391/730 (page 369)
    pour on the remainder a quantity of frefli vinegar equal to the liquor drawn off. This may be repeated three or four times; the vinegar fupplied at each time being previoufly heated. The addition of cold liquor would not only prolong the operation, but alfo endanger the breaking of the retort. Lowitz recommends the addition of half an ounce of recently burnt and powdered charcoal to each pound of vinegar in the ftill, as the belt means of avoiding empyreuma. If the common ftill be employed, it ftipuld likewife be occa- fionally fupplied with frelh vinegar, in proportion as the acid runs oft; and this continued until the procefs can be conveniently car- ried no farther. The diftilled acid mull be rectified by a fecond diftillation in a retort or glafs alembic; for although the head and receiver be of glafs or ftone ware^the acid will contrail a metal- lic taint from the pewter worm. Tlie reftduum of this procefs is commonly thrown away as ufe- lefs, although, if Ikilfully managed, it may be made turn to good account, the moft acid parts of the vinegar ftill remaining in it. Mixed with about' three times its weight of (?fine dry fand, and committed to diftillation in a retort, with a well-regulated fire, it yields an exceedingly ftrong acid, together with an empyreuma- tic oil, which taints the acid with a difagreeable odour. This acid is neverthelefs, without any redification, better for fome ^ purpofes, as being ftronger, than the pure acid; particularly for making acetite of potals or foda : for then the erapyreumatic oil, on which its ill flavour depends, is burnt out. Diftilled vinegar Ihould be colourlefs and tranfparent *, have a pungent fmell, and purely acid tafte, totally free from acrimony and empyreuma, and Ihould be entirely volatile. It Ihould not form a black precipitate on the addition of a folution of baryta, or of water faturated with fulphuretted hydrogen ; or change its colour when fuper-faturated with ammonia. Thefe circumftances Ihew, that it is adulterated with fulphuric acid, lead, copper, or tin. Diftilled acetous acid, in its effefts or. the animal economy, does not differ from vinegar, and as it is lefs pleafant to the tafte, it is only ufed for pharmaceutical preparations. ACIDUM ACETOSUM FORTE. Rdin. Strong Acetous Acid. Take of Sulphate of iron dried, one pound ; Acetite of lead, ten ounces. Having rubbed them together, put them into a retort, and diftil in a fand-bath with a moderate heat, aS long as any acid comes oytu Z4 Acidvw