NAT. ORDER. CONIFERjE. 41 



heated, the oil readily combines with it, but will be separated again 

 as soon as the spirit cools. A stream of oxymuriatic gas passed 

 through it, converts it into a yellow resin. Distilled with four times 

 its volume of water, it becomes lighter and brighter. 



Medical Properties and Uses. Canada bakatn possesses similar 

 medicinal jiroperties to the other turpentines, which are more fully 

 described under the head of Pin us sylvestris, Pinus ahies, Pin us 

 picea, and Pinus larix, in the present and other vols, of this work ; 

 consequently, we shall only make a few observations regarding the 

 use of turpentine as a remedial agent, and more especially for the 

 expulsion of tsenia. It was fii'st recommended by Dr. Fenwick as 

 an anthelmintic of extraordinary powers. The Dr. jirescribed it 

 in doses of two ounces, and repeated it in ounce doses until it had 

 the desired effect ; purging is in general produced, and the worm 

 is usually evacuated lifeless. Turpentine, when given in large 

 doses, by acting as a cathartic, seems to pi-event its absorption, 

 hence its action on the urinary organs becomes obviated, and 

 stranguary, which so frequently accompanies the internal use of 

 small doses of turpentine, is not to be apprehended ; not only for 

 the expulsion of taenia, but for other worms, (especially the Imnbrici) 

 it has been administered with equal success. Dr. Copeland 

 strongly recommends the oil in the hoemorrhagiEe, particularly in 

 atonic epistaxis, also in epilepsy, in the last stages puerperal fever, 

 and m the convulsions of infants, when arising from a disordered 

 state of the alimentary canal. It is also a powerful emmenagogue, 

 thence useless in chlorosis. We are told by Dr. Copeland, that in 

 some cases of ovarian dropsy, its effects were such as to recommend 

 its employment in the incipient stages of tliat disease, and also in 

 other dropsies. Externally, the oil is used with much advantage as 

 a primary application to scalds and burns. Dr. Kentish was the 

 hrst who introduced its use, and subsequently his practice has been 

 confirmed and adopted by many surgeons of skill and eminence. 

 It is also topically applied as a discutientto indolent tumors, &c. 



