TUSSOCK OF ECONOMIC PLANTS. 423 



inferior to tlie American ; the residual or thickened part is 

 distilled, and the oil separates and forms the well-known Oil of 

 Turpentine ; the matter that remains at the bottom of the still 

 is the common yellow rosin. 



Turpentine, Australian. — An aromatic oil so called is ob- 

 tained from Tristania conferta and Syncarjoia laurifolia {T. 

 aliens), spreading -branched laurel-leaved trees of the Myrtle 

 family (Myrtaceae), natives of New South Wales and Queensland. 



Turpentine, Canada. — The resinous substance well known 

 as Canada Balsam is the produce of Abies lalsamifera, a 

 tall tree, native of ITorth America, extending from Canada to 

 California. The balsamic fluid collects in bladder-like blisters 

 formed in the bark, and is collected in the same manner as the 

 preceding. It is used chiefly for mounting microscopic objects, 

 also for varnishing. 



Turpentine, OMan or Scio. {See Terebinth.) 



Turpentine, Strasburg, obtained from Alies (Picea) pec- 

 tincbta, the Silver Fir. A tall tree common in the Alps and 

 Central and Eastern Europe. The turpentine of this tree is 

 found in bladder-like blisters in the bark, they are most 

 abundant on the higher parts of the tree, and are reached by 

 expert climbers, who carry with them vessels for holding the 

 liquid, which freely flows when the bladders are punctured ; it 

 is purified by straining. It is called Strasburg Turpentine from 

 a large forest of silver firs growing near the city. {See also Fir 

 Trees.) 



Turpentine, Venetian or Venice, is the resinous sap that 

 flows from Larix eurojpcea, the Common Larch (which see). 



Turpentine Plant. {See Compass Plant.) 



Tussock Grass {Dactylu ccespitosa), a strong-tufted perennial 

 grass, native of the Falkland Islands, where it lines the shores 

 for one or two miles inland ; it is a sweet grass, and cattle are 

 very fond of it, and devour the tufts even to the root, and on 

 that account care has to be taken to prevent its entire extinc- 

 tion. In 1842 a living plant was brought to Kew by Dr. 

 J. D. Hooker, and afterwards seeds were obtained, which were 



