ON TWO NEW SPECIES OF LAURINEJE. 629 
under the name of Warburg's Vegetable Fever Drops, in the 
colony, and which his chemical examinations have proved to 
him to be a preparation of Bibiru, I can attest its efficacy. 
After I had suffered six months. of intermittent fever, 
during my first expedition in the interior of Guiana, and 
which reduced me to a walking skeleton, half a dose of these 
drops freed me from the fever, and restored my health. 
At present the free is only felled for its timber, and the 
bark thrown away as useless. If there be any truth in the 
statement that the Peruvian Republic intend to restrict the 
exportation of Cinchona bark, and if further experiments 
should prove the Bibiru bark to be equally efficacious, the 
Bibirine might prove a useful and important succedaneum. 
IL—The Aborigines of the interior, but chiefly the Wac- 
cawais, have from time immemorial occasionally brought 
fruits of a tree to the coast, which they recommend as an 
excellent remedy in dysentery, diarrhea, &c., and which, in 
reality, are much esteemed by the colonists as a domestic re- 
medy for these complaints. The fruits are generally divided 
into four quarters or into halves, and strung on strings for the 
convenience of drying them the better. "They are of a dark 
brown colour, and their taste is warm and spicy. Although 
Dr. Bancroft has already mentioned these nuts, under the 
name of the American Nutmeg, and Mr. Hartsinck, in 1770, 
under Camacou or the Waccawai Nutmeg, Botanists were 
unacquainted with the character of the tree which produces 
them. It was evident from the warm aromatic taste, and 
the appearance of their seeds, that they came from a Laurina- 
ceous tree; but here ended the knowledge. 
When our expedition was encamped near Roraima, the 
Arécuna Indians brought us many of these fruits (or Camara, 
as they are called by the Arécunas) for barter, which being 
a fresh state, proved that they had been only recently ga- 
thered, and on my inquiry I learned that the trees which pro- 
duced them were found in abundance near the small river 
Mapauri. I was fortunate enough to procure flowers and 
