

IS UN- 



FAMILIAR LETTERS 



PHYSICS OP THE -EARTH 



TREATING OF 



THE CHIEF MOVEMENTS 



&t>e Eantr, tf)e TOEaters, an* tfje air, 



AND THE FORCES THAT GIVE RISE TO THEM. 



BY HENBY BUFF, 



PROFESSOR OF PHYSICS IN THE UNIVERSITY OF GIESSEN. 



EDITED BY 



A. W. HOFMANN, Ph.D., F.R.S. 



PROFESSOR IN THE ROYAL I 'II I I II II*' I 1 1 I II II | I I LONDON. 



LONDON: 



TAYLOR, WALTON, AND MABERLY, 



UPPER GOWER STREET, AND IVY LANE, PATERNOSTER ROW. 



1851. 



