ii CONTENTS. 



Art. XI. Repetition of M. Dutrocliet's Experiments on the 

 Mimosa pudica. By Robert Spittal, Esq. one 

 of the Presidents of the Plinian Natural History- 

 Society, - - - - - 60 

 XII. Additional Remarks on the Climate of the Arctic 

 Regions, in Answer to Mr Conybeare. By the 

 Rev. John Fleming, D.D. F. R. S. E. Com- 

 municated by the Author, - - 65 



XIII. On a peculiar Noise heard at Nakuh, on Mount 



Sinai, ----- 74 



XIV. On the Constitution of the Territory of Rome, with 



some general Observations on the Geognostic Cha- 

 racter of Italy. By Professor F. Hoffman. With 

 a Coloured jMap, . . . - 'j6 



XV. On the different Colours of the Eggs of Birds. By 



M. Gloger, . - - - 98 

 XVI. On the Chemical Nature of the Equisetse, or Horse- 

 tail, 100 



XVII. On Parasitic Animals, and on a new Genus of that 



Family, ----- 101 



XVIII. On the ancient Forests of Scotland. By Patrick 



F. Tytler, Esq. F. R. S. E. F. A. S. &c. - 10.5 

 XIX. Salt WeDs and Springs of Inflammable Gas in China, 108 

 XX. Remarks on the Ancient Flora of the Earth, - ll2 



XXI. On the relative Conductibility for Caloric of different 

 Woods, in the direction of their fibres, and in the 

 contrary direction. By MM. Aug. db la Rive, 

 and Alph. de Candolle, - - 131 



XXII. Account of the Nuremberg Boy, Caspar Hauser, 

 who was shut up in a Dungeon from the fourth to 

 the sixteenth year of his age, - - 134 



XXIII. Fresh-water Springs at the Bottom of the Sea, 140 



XXIV. On the Lofty Flight of the Condor, - - 142 

 XXV. Notes in regard to the Geology of Cherry Island 



and Spitzbergen. By Professor Keilhau of 

 Christiania, - - - - 144 



XXVI. Is the Domestic Cat originally a native of this 



Country, - - - - 146 



XXVII. Account of a new species of Mineral named Poly- 



basite; and Observations ou Zinkenite, 148 



XXVIII. On the Egg of the Ornythorynchus, - 149 



XXIX. On the Philosophy of Nature, - - 152 



