8 



Principles of Geology, being an inquiry how fai the former chan- 

 ges of the earth's surface are referable to causes now in operation, 

 by Charles Lyell, Esq., F. R. S., President of the Geological Soci- 

 ety of London. The fourth edition, with numerous additions and 

 improvements, 4 vols. 12mo. London, 1835. From the author. 



Project for a new English Dictionary, by Charles Richardson. 

 London. 



Memorias de la Inslitucion Agronoma de la Habana, por Don Ra- 

 mon de la Sagra. Tomo Primero, 1834. From the author. 



Lethsea Geognostica ; Von Dr. H. G. Bonn, Professor an der Uni- 

 versit'at zu Heidleberg. Large folio, with numerous lithographic 

 prints. From the author. 



La Revue des Peinlres. Publication mensuelle, Livraison 16 — 

 17 — 18, vi^ith numerous lithographic prints. 



Observations of Chronometers, from the appendix to Capt. Sir 

 John Ross's Narrative of his second Expedition to the Arctic regions, 

 from 1829 to 1833. 



Instructions for making and registering Meteorological observations 

 in Southern Africa and other countries in the South Seas, and also at 

 Sea, by Sir John F. W. Herschel, F. R. S. 



HEZEKIAH HOWE h Co., New Haven, propose publishing 

 Elements of Geology. With numerous Illustrations of Fossil 

 Remains. Intended for the use of Students and Young Persons. 

 By Charles Lyell, F. R. S., one volume, 12mo., to be edited by 

 Professor Silliman. 



