Resin, a viscid, tenacious juice, which either exudes naturally, or is obtained by incision, from different trees, and shrubs, such as the pine, fir, is some what trans-parent hard and brittle, possesses a disagreeable taste ; and is not so-juble in water ; though it may, in general, be dissolved in spirit of wine, and also in expressed and essential oils.

There are numerous resins, obtained from various trees, which differ in taste, colour, smell and consistence. Such are the Common Resin, Pitch, Mastich, Lab-danum, Guaiacum, etc. ; the properties of which are stated in their alphabetical series.

Considerable quantities of Com-mon Resin ate employed by salt-boilers, in combination with wheat-en flour, to render the grain of salt smaller ; and likewise by musical instrument makers, and musicians, for effecting greater vibrations by the bows of violins.-It has farther been conjectured, that resin might be so prepared, as to adapt it to the purposes of making candles. The Society for the Encouragement of Arts, etc. has accordingly offered premiums, several years successive-ly; but no method of effecting such object has hitherto been dis-covered.—See Candles.