A. Balsam'ea, Terebinthina Canadensis, Canada Turpentine. -- The liquid oleoresin (balsam of fir), U.S.P. 1820-1900; Canada, United States, chiefly Laurentine Mountains, Quebec. Beautiful ornamental tree (American Silver Fir), 9-15 M. (30-50 degrees) high pyramidal shape; bark smooth, reddish-gray when young, filled with blisters (reservoirs) containing the oleoresin; leaves 2 cm (1') long, linear, silvery beneath; flowers staminate - catkins, pistillate - cones 5 - 10 cm (2 - 4' long), 2.5 cm (1') broad; pollen bright yellow; seed with wing. Oleoresin (Canada turpentine), viscid, yellowish, transparent, odor agreeable; taste terebinthinate, bitter, acrid, soluble in ether, chloroform, benzene; collected by puncturing vesicles with the sharp-pointed nozzle of the Abalsam-collector's can; contains volatile oil 24 p.c., acid resin 63 p.c., indifferent resin 12 p.c., acids (4) - canadinic, canadolic, a- and b-canadinolic. Properties and uses, similar to oil of turpentine, except this dries into an adhesive, transparent varnish, thus becoming valuable in microscopic technique. Dose, gr. 15-60 (1-4 Gm.) A. Fraseri - Resembles the preceding, but cones only 5 Cm. (2') long, sharp-pointed scales projecting and recurved; New England, North Carolina, in mountains; used for collecting balsam of fir.