ignifies lime, but is also used by chemists and physicians for a fine powder remaining after the calcination or corrosion of metals and other mineral substances. All metallic calces, at least all those made by fire, are found to weigh more than the metal from which they were originally produced; for a full explication of this phenomenon, see the article Fire.

CALX Antimonii. See Pharmacy, n° 773.

CALX Nativus, in natural history, a kind of marly earth, of a dead whitish colour, which, if thrown into water, makes a considerable bubbling and hissing noise, and has, without previous burning, the quality of making a cement like lime or plaster of Paris.

CALX Viva, or Quick-lime, that whereon no water has been cast, in contradistinction to lime which has been slaked by pouring water on it. See Chemistry, n° 34.

CALYCANTHEMÆ, in botany, an order of plants in the Fragmenta methodi naturalis of Linnæus, in which are the following genera, viz. epilobium, cænotheca, jasminum, ludwigia, oldenlandia, linaria, &c. See Botany, sect. vi. 17.

CALYCIFLORÆ, in botany, the 16th order in Linnæus's Fragmenta methodi naturalis, consisting of plants which, as the title imports, have the flamma (the flower) inserted into the calyx. This order contains the following genera, viz. cleagnus, hippophae, olivis, and trophis. See Botany, sect. vi. 16.

CALYCISTÆ, (from calyx the flower-cup), systematic botanists, so termed by Linnæus, who have arranged all vegetables from the different species, structure, and other circumstances, of the calyx or flower-cup. The only systems of this kind are the Character plantarum novus, a posthumous work of Magnolius, professor of botany at Montpelier, published in 1720; and Linnæus's Methodus calycina, published in his Clavis Plantarum, at Leyden, in 1738. See Botany, p. 1290.