. Cooley's cyclopaedia of practical receipts and collateral information in the arts, manufactures, professions, and trades including medicine, pharmacy, hygiene, and domestic economy : designed as a comprehensive supplement to the Pharmacopoeia and general book of reference for the manufacturer, tradesman, amateur, and heads of families. WILLOW VOL. II 1X)3 1634. TEA. C/yi-flELLIA JNCONSPICUUSj Leaves used in the adulteration of tea—the sloe, willow, oak, beech, elder, and hawthorn, have been naturejprinted nud then lithogvai)hed. The drawings of the chloranthus inconspicuus and the camellia s
. Cooley's cyclopaedia of practical receipts and collateral information in the arts, manufactures, professions, and trades including medicine, pharmacy, hygiene, and domestic economy : designed as a comprehensive supplement to the Pharmacopoeia and general book of reference for the manufacturer, tradesman, amateur, and heads of families. WILLOW VOL. II 1X)3 1634. TEA. C/yi-flELLIA JNCONSPICUUSj Leaves used in the adulteration of tea—the sloe, willow, oak, beech, elder, and hawthorn, have been naturejprinted nud then lithogvai)hed. The drawings of the chloranthus inconspicuus and the camellia sasanqua, whichare said to be used by the Chinese, are copied from Hassall. The leaves of the elm, poplar, and plane are said tobe sometimes used in England. Falsification with any kind of leaf is, however, now decidedly uncommon in thiscountry. TEA 1635 off from the leaves are precipitated, whilehoiling, with a slight excess of neutral leadacetate, filtered, and tested as follows :—About20 of the pure tea infusion, when gentlyheated with a few drops of silver nitrate, givesa slight cloudiness only; while tea, containingcatechu, gives a copious brownish precipitate,and the liquid acquires a distinct yellow drop of ferric chloride gives a light greencolour if catechu is present, and a greyish-green precipitate on standing; the solutionfrom pur
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