131 



532. PINUS SYLVBSTEIS, continued. 



Note. Archangel pitch is also produced by Larix Sibirica, Ledeb. Pitch 

 has been used, made into pills with flour, in skin diseases and languid 

 circulation. See Per. Mat. Sled., vol. ii., pt. i., p. 324. Pitch is the 

 residue in the still after the distillation of wood tar. 



The volatile oil is official in the Throat Hospital Pharmacopoeia, 

 p. 90. For fig. of plant, see Bentley and Trimen, Med. Plant*, tab. 257. 



533. PINUS TJEDA, L. ; PINUS PALUSTRIS, Mill; PINUS AUSTRALIS, Mich. 



a. Oleoresin. (Crude Turpentine.) 



b. Concrete ditto. Two specimens. (Resina Abietis, 



American Frankincense, Gum Thus.) Presented by 

 Mr. Kee. 



c. Volatile oil. (Oil of Turpentine, Spirit of Turpentine.) 



d. Ditto, rectified from water, and having left-handed 



polarization. 



e. Ditto, with both right-handed and left-handed polar- 



ization. 



/. Resin. (White Rosin.) 



g. Ditto, ditto. (Poix-resine.) From Prof. Guibourt. 

 h. Ditto. ( Yellow or Amber Rosin.) 

 i. Ditto. (Black Rosin, or Colophony.) 



Note. White rosin is the residue from the distillation of oil of turpen- 

 tine, and owes its opacity to water contained in it. When this is driven 

 off entirely, the resin becomes transparent, and forms the amber or yel- 

 low rosin of commerce. When heated more strongly, it forms black 

 rosin, or colophony. For fig. of P. palustris, see Bentley and Trimtn, 

 Med. Plants, tab. 258, and for P. Taeda, tab. 259. 



TAXACE^E. 



534. DACRYDIUM CUPBESSINUM, Lamb. (Dimon Pine.) 



a. Bark, leaves, and extract. 

 Note. The extract has an astringent taste. 



CYCADACE^E. 



535. CICAS RBVOLUTA, Tliunb. 



a. Section of stem. 



b. Frm't. 



c. Seeds. From Foo-chow, China. Presented by Mr. D. 



Hanbury. 



Note. Japan sago is said to be made of the starch of this plant ; but 

 it is not imported into England. See Per. Mat. Med., vol. ii., pt. i., 

 p. 298. 



