38 Notices respecting New Books, 



and which came up the first, was about half full of water, and 

 the cork and sealing as perfect as when it first entered the 

 sea. 



The cork of the second bottle, which had been previously 

 filled with fresh water, was loosened and a little raised, and 

 the water was brackish. 



The third bottle, which was sealed and covered with a single 

 piece of sail-cloth, came up empty, and in all respects as it 

 descended. 



The fourth bottle, with a long neck, and the cork of which 

 was secured with two layers of linen, was crushed to pieces, 

 all except that part of the neck round which the line was tied ; 

 the neck of the bottle both above and below the place where 

 the line was fastened had disappeared, and the intermediate 

 portion remained embraced by the line. This I thought a 

 little remarkable; and perhaps may be explained by supposing 

 that the bottle was first filled by the superincumbent pressure 

 with dense sea- water, which expanded on being drawn up 

 near the surface. Had the vessel been broken by external 

 pressure, that part surrounded with the line ought to have 

 been crushed with the rest. 



The fifth bottle, which had been made for the purpose of 

 containing French perfumery or aether, and which was there- 

 fore furnished with a long close glass stopper, came up about 

 one- fourth filled with water. 



The hollow glass globe, hermetically sealed, which was 

 the last and had been sunk the deepest of all, was found per- 

 fectly empty, not having suffered the smallest change. It is 

 therefore concluded, that at the depth of 230 fathoms the wa- 

 ter enters glass vessels through the stoppers and coverings 

 which surround them, and not through the pores of the glass. 

 What the effect of a pressure of 400 fathoms or more will 

 have on the glass globe above mentioned, Captain Dixey has 

 engaged to ascertain for me on his return to America, if op- 

 portunity shall offer. 



IX. Notices respecting New Books. 



A Geological Memoir on a Part of Western Sussex; ivith some Ob- 

 servations upon Chalk-Basins, the Weald- Denudation, and Out- 

 tiers- by -protrusion. By P. I. Martin. London, 1828; 4to; 

 pp. 100, and Synoptical Table; coloured Plates iii, and a Geo- 

 logical Map. 

 ON the occasion of reviewing Mr.Mantell's admirable " Illustra- 

 tions of the Geology of Sussex," in the Philosophical Maga- 

 zine for December last, we expressed a hope that the example of 



that 



