178° —  Brongmiart, Sur Les Vegetaux Fossiles. 
7. A Hora of the Middle and Northern States. 
Dr. Torrey of New-York has now in the press a Flora 
of the Middle and Northern sections of the United States, 
being a systematic arrangement and description of ail the 
plants hitherto discovered in the United States, north of 
Virginia. 
This work will contain original descriptions of all the 
species which have come under the observation of the au- 
thor, to which will be added copious synonyms.and_locali- 
ties. Its plan will be nearly similar to that of Mr. Elliot’s 
_valuable Flora of the Southern States, and will with that 
work and the promised Western Fiora of Mr. Nuttall, form 
as Complete an account of the plants of the United States 
as our present knowledge will afford. 7% 
8. Finch’s Geology. 
Mr. J. Finch intends soon to publish 4n Introduction to 
the Study of Geology, designed to facilitate the acquisition 
of that highly interesting branch of Science. 
Il. Foreien. 
1. Analysis of a Treatise, “ Sur la Classification et la dis- 
tribution des vegetaux Fossiles, (On the Classification 
distribution of fossile vegetables,) par M. Adolphe Brongni- 
art. 
(Communicated by James G. PERCIVAL.) 
After a few general observations, and an enumeration of 
authors who have written on the same subject, the most im-_ 
portant of whom are M. Schlothei d Sternberg of Germa- 
ny whose works are in the German Language ;* the author 
proceeds in his first Chap. to his Classification of fossile ve~ 
getables, of which he gives a tabular view and a detailed 
exposition. In the second Chap. he gives a descriptive ac- 
count of the fossile vegetables discovered in what he calls 
the formations of superior sediment or tertiary formations, 
which extend from the plastic clay and the lignites which 
* Die Petrefactenkunde (The science of Petrifactions) von Schlotheim : 
Flora der vorwelt (Flora of the ancient world) von Sternberg. 
