The sylva americana; or, A description of the forest trees indigenous to the United States, practically and botanically considered . of the pines is extractedby means of incisions in the body of the tree, at which it exudesfrom the pores of the bark and from the sap vessels of thealburnum. In the silver fir this substance is naturally depositedin vesicles on the trunk and limbs, and is collected by burstingthese tumors and receiving their contents in appropriate resin is sold in Europe and the United States under thename of Balm of Gilead, though every body knows that the truebalm
The sylva americana; or, A description of the forest trees indigenous to the United States, practically and botanically considered . of the pines is extractedby means of incisions in the body of the tree, at which it exudesfrom the pores of the bark and from the sap vessels of thealburnum. In the silver fir this substance is naturally depositedin vesicles on the trunk and limbs, and is collected by burstingthese tumors and receiving their contents in appropriate resin is sold in Europe and the United States under thename of Balm of Gilead, though every body knows that the truebalm of Gilead is produced by the Amyris gileadensis, a verydifferent vegetable and a native of Asia; perhaps the name hasbeen borrowed in consequence of some resemblance between thesubstances in taste and smell. The fresh turpentine is a greenishtransparent fluid of an acrid penetrating taste ; given inconsider-ately it produces heat in the bladder, and applied to wounds itcauses inflammation and acute pains. It has been highlycelebrated in England, and is recommended in certain stages ofthe pulmonary consumption. Hemlock Fig. 1. PLATE branch with a cone. Ffs. ?. A seed. Ahies canadensis. The hemlock spruce isknown only by this namethroughout the United States,and by that oiPerusse amongthe French Canadians. Itis natural to the coldest re-gions of America, and beginsto appear about HudsonsBay, near lake St. John,and in the neighborhood ofQuebec it fills the forests,and in Nova Scotia, NewBrunswick, the state ofMaine, Vermont and a con-siderable part of New Hamp-shire, it constitutes three-fourths of the evergreen I^ENDROLOGY. 97 woods. Farther south it is less common, and in the Middle andSouthern States is seldom seen except on the Alleghanies; eventhere it is often confined to the sides of the torrents and to the mosthumid and gloomy exposures. Moist grounds appear not to bein general the most favorable to its growth. It flourishes bestin a sandy loam at the foot o
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Keywords: ., boo, bookcentury1800, booksubjectforestsandforestry, bookyear1832
