INDEX II. 



125 



theoretical and practical methods of de- 

 termining the, 47. 



Cambodia, notes on, 88. 



Camphor, on solid and liquid, from the 

 Dryobalanops camphora, 52. 



Canada, on various facts relating to the 

 physical structure of, 59. 



Cape frontier, fossils and plants collected 

 on the, exhibited, G8. 



Carcharias megalodon, on, 54. 



Cai'penter (Capt.) on the duplex rudder 

 and screw propeller, 110. 



Chalk formation, on the pterodactyles of 

 the, 55. 



Chapman (H. S.) on the statistics of New 

 Zealand, 98. 



Chemistry, 43 ; on agricultural, especially 

 in relation to the mineral theory of 

 Baron Liebig, 45, 



■Children of the poorer classes, statistics of 

 the attendance in schools for, 99. 



Chile, on the great earthquake experi- 

 enced in, on April 2, 1851, 85. 



Clay of Sheppey, on the remains of a 

 gigantic bird from tlic London, 55. 



Claudet (A.) on the dangers of the mer- 

 curial vapours in the Daguerreotype 

 process, and the means to obviate the 

 same, 44 ; on the use of a polygon to 

 ascertain the intensity of the light at 

 different angles in the photographic 

 room, 45. 



Climate of western India, on the, 29. 



Coals, on some theoretical and practical 

 methods of determining the calorific 

 efficiencies of, 47. 



Coal mines, on a direct action steam-fan 

 for the more perfect ventilation of, 116. 



Comet of short period, discovered Feb. 2G, 

 1846, and its reappearance in 1851, on 

 the, 23. 



Compasses, deviations of the, of H.M. 

 steam ships Ajax and Blenheim, 10. 



Copper-bearing rocks of Lake Superior 

 and Huron, on the age of the, 59. 



Corle (T.) on the mortality in different 

 sections of the metropolis in 1849, 99. 



Cox (Homersham), the parallelogram of 

 mechanical magnitudes, 1. 



Crag, on the groat shark of the red, 54 ; 

 on the Echinodermata of the, 58 ; on 

 the occurrence of a stratum of stones 

 covered with barnacles in the red, at 

 VVherstead, G5 ; on the fossil mammalia 

 of the red, G7 ; on the structure of the, 

 ih. ; on some tubular cavities in the 

 coral-line, at Sudbourne and Gedgrave 

 in Suffolk, 70. 

 Crawfurd (W. John) on the negro races 

 of the Indian Archipelago and Pacific 



islands, 86 ; on the geography of Bor- 

 neo, with description of the condition 

 of the island, and its cliief products, 

 illustrated by historical references, 88. 



CruciferEB, on the morphology of the fruit 

 in the, 70. 



CuUen (Dr.) on a proposed canal across 

 the isthmus of Darien, 88. 



Cymri, on the origin and institutions of 

 the, 84. 



D'Abbadie (Antoine), a synopsis of 

 seventy-two languages of Abyssinia and 

 the adjacent countries, 88. 



Daguerreotype process, on the dangers of 

 the mercurial vapours in the, and the 

 means to obviate the same, 44. 



Darien, on a pi-oposed canal across the 

 isthmus of, 88. 



Devonian rocks in North Africa, on the 

 discovery of, 58. 



De Vry (Professor J. E.) on nitro-glyce- 

 rine and the products of its decomposi- 

 tion, 52 ; on solid and liquid camphor 

 from the Dryobalanops camphora, 58. 



Diamagnetism, on, 15. 



Diamond slab supposed to have been cut 

 from the Koh-i-Noor, on a, 44. 



Dipping-needle, effect of three iron cy- 

 linders u[)on the, when placed in a 

 given position, 9. 



Domingo, ethnological researches in 

 Santo, 90. 



Doull (Alexander) on a railway commu- 

 nication from the Atlantic to the Pacific 

 in the territories of British North Ame- 

 rica, 111. 



Dryobalanops camphora, on solid and 

 liquid cainphor from tlie, 52. 



Earl (Windsor), note on Cambodia, 88. 



Earthquake experienced in Chile, April 2, 

 1851, on the, 85. 



Earth's rotation, Professor Powell on M. 

 Guyot's experiment on the, 23. 



East India Company's Service, on the 

 vital statistics of the armies in the, 99. 



Echinodermata of the crag, on the, 58. 



Elasticity and heat, on the results of the 

 hypothesis of molecular vortices, as ap- 

 plied to the theory of, 3. 



Electric chain battery, on M. Pulverma^' 

 cher's patent portable hydro-, 52. 



Electricity, G ; on the conduction of, 

 through water, ih. 



Electro-magnetism, on an apparatus for 

 making astronomical observations by 

 means of, 21. 



Elephant, on the femur of a gigantic fos- 

 sil, 51. 



