2yS CHAPTER 48. 
take not, by Dr.FoTHERGiLL, in 8^ 1747. 
pp. 39. They have been confidered, and 
appealed to, as among the moft decifive in 
eftablifhing the dodrine they were intended 
to illuftrate and confirm. 
MITCHELL, 
Dr. Jol^ri Mitchell, then refident at 
UrbdJtay in Virginia y fent over, in 174.1 
the defcriptions of thirty genera of plants, 
of which fix were entirely new; others were 
corredted ^nd amended. Among the moft 
remarkable are, the Ginfeng of America^ 
Panax qiiinquefoliiim : the Liquid Ambar 
Styracijiua: the MalacodendroUj afterwards 
called by Catesby, Stewartia, in ho- 
nour of the £^r/ 5/^ Bute : the Zizania 
aquatica. In the introdud:ion. Dr. Mit- 
chell dlfcoiii-fes on the principles of bo- 
tany, and appears to have paid attention to 
the Hybrid produdlions. This paper was 
feparately publiflied, in 4°. at Nurenburghy 
ill 1769. 
In 1 743 J he fent over to Mr. Collin- 
50 N, an ingenious " Eflay on the Caufes of 
the difi'erent Colours of People in difi^e- 
rent 
