SALICACE, SILVA OF NORTH AMERICA. 105 
contains obscure medullary rays, and is light reddish brown, with thin nearly white sapwood. The 
specific gravity of the absolutely dry wood is 0.4456, a cubic foot weighing 27.77 pounds. 
The bark is frequently used domestically as a tonic in the treatment of fevers. 
First described by Humphry Marshall! in the Arbustum Americanum published in 1785, Salix 
nigra was introduced into the Botanic Garden of Berlin before 1805.’ 
1 See viii. 39. 2 Willdenow, Spec. iv. pt. ii. 657. 
