5 78 Brongniart, Sur Les Vegetaux Fossiles. 



7. A Flora of the Middle and Northern States, 



Dr. Torrey of New- York has now in the prfess a Flora 

 of the Middle and Northern sections of the United States, 

 being a systematic arrangement and description of all 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 Flora of Mr. Nuttall, form 

 as complete an account of the plants of the United States 

 as our present knowledge will afford. 



8. FincWs Geology. 



Mr. J. Finch intends soon to publish An Introduction to 

 the Study of Geology, designed to facilitate the acquisition 

 of that highlj interesting branch of Science. 



n. Foreign. 



1. Analysis of a Treatise, " Sur la Classification et la dis- 

 tribution des vegetaux Fossiles, {On the Classification and 

 distribution of fossil e 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 w horn are M. Schlotheim aiid 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 j 

 Flora der vorwelt (Flora of the ancient worldj von Sternberg. 



