Geology and Natural History. 313 
has a letter correcting in strong language the statement of his 
he American Association in The letter closes with the 
remark that “only an incomprehensible misunderstanding can 
account for his statement, which has been already sufficiently re- 
futed by Dana in the American Journal of Science for February 
and August of 1872,” 
explained, and illustrated on a colored “ preliminary geological 
map” of the State. This map shows that the Archean (Azoic) 
S 
14. fh, 
the first water, was found Nov. 6th, 1872, at Waldeck’s placer, 
Vaal river, South Africa, by Robert Spaulding’s party. It is 
Stated to measure about ch in diameter. If this statement is 
confirmed the Waldeck-Spaulding diamond is among the largest 
rough diamonds of which we have mention. ent weighed 
Goleonda weighs 340 carats. The Minin 
Feb. 22, gives a figure of the Waldeck-Spaulding stone, taken from 
a photograph, which shows its form to be an irregular octahedron. 
15. Trantwinite—E. Gotosmrru has thus named (Proc. Acad. 
