•fob n Strong .V< wbt rry. — Stt vt nson. '.' 
mains good. The close revision of the work within the state 
has necessitated some changes, hut they are fewer than might 
have been expected. Some of the errors in Dr. Newberry's 
references were due to erroneous identifications made by, at 
least, one of the aids or younger assistants, and others appear 
to have been due to similarly erroneous identification on tin- 
part of other aids. There is no room for surprise that some 
of Dr. Newberry's correlations with Pennsylvania coal beds 
proved wrong; they were merely suggestive — they could he no 
more: for the geology of western Pennsylvania had not been 
made perfectly clear by the geologists of the first survey of 
that state, who had made their investigations when the coun- 
try was hut little developed. 
Dr. Newberry's labors in paleobotany began evidently at 
once after his return from France, for in 1853 he published 
the studies of Carboniferous plants already referred to. No 
further publications respecting ( 'arboniferous plants appeared 
until 1873. when vol. i of the final reports of the Ohio survey 
was issued. This contained descriptions of only a few new 
species, the rest of his material being retained to make part of 
a third volume on palaeontology, which, unfortunately, was not 
ordered by the legislature. This seems to have been his last 
publication upon Palaeozoic plants. 
The first discussion of Mesozoic and Cenozoic plants ap- 
peared in the report on California and Oregon in connection 
with the discussions of the coals of Vancouver and Oregon: 
but the studies of plants belonging to those eras began in 
earnest after his return from the Colorado river expedition, 
when tin- specimens collected by Haydenin the Upper Missouri 
region and those collected by himself in the eastern part of 
New Mexico were compared. His recognition of the Creta- 
ceous age of those plants involved him in a somewhat acrimo- 
nious controversy with other palseobotanists of this country 
and Europe, which, however, to the credit of all concerned in 
it ended without leaving any personal bitterness behind it. 
During the war he published the results of a study of collec- 
tions brought in by George Gibbs of the Northwestern Bound- 
ary survey, in winch he reiterated his statement that the Van- 
couver coals are Cretaceous, while those of the mainland are 
of later date, probably Miocene. 
