254 



SECTIONS. ^INDEX OF SUBJECTS, 



Graptolites, discovery of, in the lydit and 

 Plithanit, in the district of Wilsdruff, 

 Saxony, Dr. Geinitz on the, 1860, 79. 



Grass-cloth of India, Dr. H. Cleghorn on 

 the, 1850, 310. 



Grasses, Dr. Latham on the increase of the 

 ergot upon, 1845, 75. 



, J. Hardy on an Acarus and a Vibrio 

 that attack, 1850, 124. 



Grattan's instrument for whirling cards 

 with coloured sectors on them, to show 

 the effect of combining colours, 1850, 

 21. 



Grauwacke of Devon, Rev. D. Williams on 

 the, 1837, 94. 



' rocks of Berwickshire, D. Milne on 



the, 1834, 625. 



Gravel deposits in England, H. E. Strick- 

 land on the nature and origin of, 1837, 

 61. 



near Birmingham, H. E. Strickland's 



queries respecting the, 1839, 71. 



< near Worcester, J. Allies on marine 



shells found in, 1839, 70. 



Gravels of Ireland, T. Oldham on the oc- 

 currence of marine shells in the, 1844, 



57. 



Gravitation, light, heat, electricity and mag- 

 netism, on the identity of the existences 

 or forces of, 1848, 53. 



/Great Eastern' steamship, magnetic experi- 

 ments made on board the, by W. Eundell, 



1857, 22 ; J. S. Russell on the mechani- 

 cal structure of the, 195, 



Grecian music, Dr. S, Rootseyon, 1836, 37. 

 Greek alphabet. Rev. Dr. E. Hincks on the 



state of the, at different periods, 1857, 



142. 



mouldings and ornaments, Penrose 



and Bennett's instrument for drawing 

 any form of, 1852, 130. 



Green sand. Prof. Henslow on nodules from 

 the, 1845, 51. 



of the north of Ireland, Prof. J. F. 



Hodges on the phosphatic nodules of the, 

 1852, 36. 



, upper and lower, and sandstone of 



the neighbourhood of Cambridge, Rev. 

 Prof. Sedgwick on the, 1845, 41. 



, upper, formations near Cambridge, 



Prof. Owen on remains of new and gi- 

 gantic species of Pterodactyle from the, 



1858, 98. 



Grenier mobile, or moveable granary for 

 preserving corn, O. Byrne on the, 1844, 99. 



Gresham buoy for recording the loss of 

 missing ships at sea, J. Oldham on the, 

 1858, 219. 



Gritstone and clay-slate, on their alteration 

 into mica-schist and gneiss by the granite 

 of Wicklow, by J. B. Jukes, 1856,^68. 



Grove's battery, description of an arrange- 

 ment of, by Gr. J. Stoney, 1857, 20. 



Guanches, the extinct inhabitants of the 

 Canary Islands, Dr. Hodgkin on the stft- 

 tureof the, 1844, 81. 



Guano, R. Warington on, 1844, 32. 



, Malacca, Dr. Cantor on, 1845, 39. 



in the Faroe islands, on the dwcovery 



of, 1845, 64. 



Gull, Bonaparte's, 1852, 77. 



Gum-dragon tree. Dr. Mackay on the treat- 

 ment and flowering of a plant of, 1850, 

 114. 



Gun-barrels, W. Greener on the manufac- 

 ture of the finer irone and steels for, 

 1849, 115. 



Gunpowder, on the application of the vol- 

 taic battery to the ignition of, by Capt. 

 Ward, 1854, 18. 



Guns and cannon, S. Smith on the bursting 

 of, 1858, 221. 



Guns, large, Capt. Blakely on improvements 

 in, 1857, 179. 



Gutta percha, E. Solly on, 1845, 32. 



percha, Dr. Lankester on the plant 



which yields, 1847, 86. 



percha, artificial, Chevalia* de Claus- 



sen on, 1855, 103. 



percha and india rubber as insulators 



for subaqueous telegraphic wires, S. W. 

 SHveron, 1860, 212. 



percha as an insulator at various tem- 

 peratures, F. Jenkin on, 1859, 248. 



percha, G. Busk on its employment 



for modelling, 1847, 81. 



percha, G. Busk on its use for making 



moulds for casts of objects in natural 

 history, 1847, 92. 



percha, on its application to the arts 



and mannfactures, by F. Whishaw, 1848, 

 122. 



Guyot's (M.) experiment on the earth's ro- 

 tation. Rev. Prof. Powell on, 1851, 23. 



Gymnolepas Cuvieri, 1846, 86. 



Gymnotus electricus, employed as a medi- 

 cal shock-machine by the natives of Su- 

 rinam, 1859, 158. 



Gypsiun, on a crystalline deposit of, in the 

 reservoir of the Highgate waterworks, by 

 Dr. Gladstone, 1855, 63. 



, unequal expansion of, when heated, 



1837, 43. 



Gyrodus, Prof. Owen on the teeth of the 

 genus, 1838, 143. 



Gyroscope, sur le mouvement de la terre au 

 moyen du, par L. Foucault, 1854, 56. 



Habitat of plants as influenced by the na- 

 ture of strata, Rev. W. S. Symonds on the, 

 1860, 102. 



Haemadynameter, J. Blake on a, 1838, 129. 



Haematite, extraordinary bed of, 1845, 49. 



Haematoxylin, the colouring principle of 

 logwood. Prof. Erdmann on, 1842, 33. 



Haemorrhage from arteries, Dr. Macartney 

 on means to suppress, 1839, 97. 



from large arteries, Dr. Houston on 



the means adopted by nature in the sup- 

 pression of, 1843, 80. 



Hemorrhagic disease, on the pressure of the 

 atmosphei* and its power in modifying 



