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PUBLISHED WITII THE APPROVAL OF THE LORDS COMMISSIONERS OF 

 HER majesty's TREASURY. 



GEOIaOGSCAIj OBSSHVATZOHS MABE BURIJJG THS 



vo"^Aas or 22. m. s. BBAaiiS, 



Under the Command of Captain Fitzroy, R.N. 



Part I.— On Coral Fonnations. 



By Charles Darwin, M.A., F.R.S., Sec. G. S., kc. Demy 8vo., 

 with Plates and Woodcuts, price 15s. in cloth. 



Part II.— On the Volcanic Islands of the Atlantic and Pacific 



Oceans. 



Together with a brief Notice of tlie Geology of the Cape of Good Hope, 

 and of part of Australia. By Charles Darwin, M.A., Esq. Price 

 10s. 6d. demy 8vo. cloth, with Map. 



Part III. — On the Geology of South America. 



By Charles Darwin, M.A., Esq. Demy 8vo., with Map and Plates, 

 price 12^. cloth. 



AK INQUIitV INTO THE NATURE AND COURSE OP 

 STORMS IN THE INDIAN OCEAN, 



South of the Equator; with a view of discovering their Origin, 

 Extent, Rotatory Character, Rate and Direction of Progression, 

 Barometrical Depression, and other concomitant phenomena; for tho 

 ])ractical purpose of enabling ships to ascertain the proximity and 

 relative position of Hurricanes ; with suggestions on the means of 

 avoiding tliem. By Alexander Tuom, Surgeon 8Cth Royal County 

 Down Regiment. In one vol. 8vo., with Map and Plates, price I2s. 

 cloth. 

 "The work before us is most valuable to seamen. . . . Mr. Thorn e;ives us the result 

 of his observations at the Mauritius; a station wliich is peculiarly well adapted for ob- 

 serving the hurricanes of the Indian Ocean, the ravages of whicii seamen have annually 

 experienced; and those observations, combined with the results obtained by indefatigable 

 enquiry, have entitled him to the gratitude of seamen, who may now profit by them. . . 

 Mr. Thorn's theory is rational and philosophical, and to us it is most satisfactory. . . . 

 There are important considerations for seamen in this work." — Nautical Magazine. 



" The author proceeds in strict accordance with the princi[ilcs of inductive 

 philosopiiy, and collects all bis facts before he draws his inferences or propounds a 

 theory, llis statements are so full and clear, and drawn from such simple sources, yet 

 are so decisive in their tendency, that we think there can be no doubt he has established 

 the rotatory action of storms. The practical application of his investigations are too 

 palpable to be missed." — Britannia. 



A DISSERTATION ON THE TRUE AGE OP THE EARTH, 



As Ascertained from the Holy Scriptures. Containing a 

 Review of the Opinions of Ancient and Modern Chronologers, including 

 Usher, Hales, Clinton, and Cuninghame; and a Chronological Table 

 of the Principal Epoclis and Events in Sacred and Profane History, 

 from the Creation to the Present Time. By Professor Wallace. 

 In demy 8vo., price 12*. cloth. 

 " it is learned and laborious." — Britannia. 



EXPERIMENTAL RESEARCHES, CHEMICAL AND 

 AGRICULTURAL. 



Part I. contains — Carbon a Compound Body made by Plants, in quan- 

 tities varying with the circumstances under which they are placed. — 

 Part II. Decomposition of Carbon during the Putrefactive Fermentation. 

 By Robert Riug, F.R.S. In demy 8vo., price 7*. Gd. 



