CONTENTS. Vii 



Page 

 Dr. ScoPFfeiiN 66 Gambogic Acid and the Gambogiates, and their use in 

 Artistic Painting 51 



Dr. R. Angus Smith on Sulphuric Acid in the -Air and Water of Towns 52 



Professor J. E. De Vuy on Solid and Liquid Camphor from the Dryolalanops 

 Camphora ■- i 52 



■ on Nitro-Glycerine and the Products of its Decompo- 

 sition 52 



Mr. W. H. Walenn on the Construction and Principles of M. Pulvermacher's 

 Patent Portable Hydro-Electric Chain Battery and some of its Effects 52 



Professor A. W. Williamson on the Constitution of Salts 54 



GEOLOGY AND PHYSICAL GEOGRAPHY. 



Mr. J. S. BowERBANK on the probable Dimensions of the great Shark {Carcha- 

 rias meyalodon) of the Red Crag 54 



on the Remains of a Gigantic Bird from the London Clay 



of Sheppcy 55 



on the Pterodactyles of the Chalk Formation 55 



Dr. Buist's Indications of Upheavals and Depressions of the Land in India... 55 



Professor E. Forbes on the Echinodermata of the Crag 58 



on the Discovery by Dr. Overweg of Devonian Rocks in 



North Africa 58 



Mr. William Hopkins on the Distribution of Granite Rocks from Ben 

 Cruachan 59 



Mr. W. E. Logan on the Age of the Copper-bearing Rocks of Lake Superior 

 and Huron, and various facts relating to the Physical Structure of Canada... 59 



Mr. J. W. Salter's Note on the Fossils above mentioned, from the Ottawa 

 River 63 



Sir Charles Lyell on the Occurrence of a Stratum of Stones covered with 

 Barnacles in the Red Crag at Wherstead, near Ipswich 65 



Sir Roderick I. Murchison on the Scratched and Polished Rocks of Scotland 66 



Professor Owen on new Fossil Mammalia from the Eocene Freshwater Forma- 

 tion at Hordwell, Hants Qf 



on the Fossil Mammalia of the Red Crag 67 



Mr. John Phillips on the Structure of the Crag i 67 



M. Constant Provost's Explication d'un Tableau de I'Etude Methodique de 

 laTerre et du Sol 68 



Dr. ScHAFHAEUTL on Klinology in reference to the Bavarian Alps 69 



Captain Strachey on the Geology of a part of the Himalaya and Thibet 69 



Mr. Searles V. Wood on some Tubular Cavities in the Coralline Crag at 



Sudbourne and Gedgrave in Suffolk 70 



BOTANY AND ZOOLOGY, including PHYSIOLOGY. 

 Botany. 

 Professor G. J. Allman on the Morphology of the Fruit in the Cruciferse, as 



illustrated by a Monstrosity in the Wallflower 70 



Rev. M. J. Berkeley and C. E. Broome on some Facts tending to show the 



probability of the Conversion of Asci into Spores in certain Fungi 70 



Dr. Edwin Lankester on a Monstrosity of Lathyrus odoratus 72 



on the Theory of the Formation of Wood and the 



Descent of the Sap in Plants 72 



1851. b 



