CHAP. XII.] 



ABIETINEiE. 



209 



trees into pieces, and putting them into a sort 

 of oven ; when the tar runs from the charred 

 wood, and lamp-black is made from the soot 

 which collects on the roof of the oven. Pitch 

 is boiled tar. Pyroligneous acid is obtained by 

 burning the wood into charcoal in an iron 

 cylinder, and condensing the vapour that arises 

 from it. 



THE GENUS PIN US. 



This genus, according to Linnseus, was made 

 to include all the Pines and Firs, the Cedar 

 and the Larch ; and this arrangement has been 

 followed by the late A. B. Lambert, Esq., in his 

 magnificent work 

 on this tribe. In 

 its present re- 

 stricted form, it 

 contains only those 

 plants that have 

 longslender leaves, 

 which are pro- 

 duced in membra- 

 naceous sheaths, 

 (see a in jig. 93) 

 two, three, or five 

 together. The 



male flowers are 



produced in long r^*^- 93 — branch of thk scotch Pine. 



upright catkins, {m) growing two or three toge= 



