284 



SECTIONS. INDEX OF SUBJECTS. 



Oaks of Spain, Capt. Widdrington on the, 



1847, 88. 

 Oats, J. P. Norton on the ashes of, 1845, 35. 

 Object-glass, double, on the achromatism of 



a, by Prof. Stokes, 1855, 14. 

 Object-glasses, achromatic, D. Dick on, 1834, 



593- 

 ■ , compound, of microscopes, Sir D. 



Brewster on the centring of the lenses of 



the, 1857, 4. 



, on the focus of, by A. Claudet, 1859, 



61. 



Observatory, Edinburgh, Prof.Piazzi Smyth 

 on a new form of equatorial mounting for 

 the, 1850, 187. 



at Glasgow, Prof. Nichol on the, 1842, 



12. 



— — , Royal, Greenwich, G. B. Airy on the 

 pivots and construction of the large tran- 

 sit-circle for the, 1850, 169. 



-F , Kew, F. Ronalds on observations and 



experiments at the, 1847, 30. 



• , Kew, J. Welsh on the graduation of 



standard thermometers at the, 1853, 34. 



, Travancore, J. A. Broun on results 



of observations in the, 1860, 20. 



— — , portable. Rev. Dr. Lloyd on the ar- 

 rangement of the, adopted by Capt. J. 

 Ross, 1839, 14. 



• at Alten in Lapland, magnetical and 



electro-meteorological, Dr. J. Lee on the 

 advantages to be derived from the esta- 

 blishment of a, 1847, 34. 



, magnetical, of Munich, Dr. Lament's 



account of the, 1840, 26. 



——,magnetical and meteorological, at Bom- 

 bay, A. B. Orlebar on the, 1847, 28. 



— — , magnetical, meteorological, and astro- 

 nomical, on the mountain of Angusta 

 Mullay, in Travancore, at 6200 feet above 

 the sea, J. A. Broun on the, 1855, 25. 



— — , meteorological and magnetical, at 

 Travancore, on the successful establish- 

 ment of a, by Col. Sykes, 1858, 30. 



Observatories, magnetical, Rev. Dr. Lloyd on 

 the best position of the magnets in, in re- 

 ference to their mutual action, 1839, 12. 



-— — of Russia and of Greenwich, Prof. 

 Struve on the importance of accurately 

 connecting the, 1847, 46. 



, W. S. Jacob on a folding dome for, 



1850, 180. 



Occultation, Rev. Prof. Chevallier on a gra- 

 phical method of computing, 1847, 7. 



Ocean, en the pi'obable maximum depth of 

 the, by S. V. Wood, juh., 1855, 81, 99. 



currents, A. G. Fiiedlay on. 1853, 76. 



Oceans, Northern and North Atlantic, Rev. 

 Dr. Scoresby on the surface temperature 

 and great currents of the, 1853, 18. 



Odontograph, Prof. WiUis on the, 1838, 1 54. 



Odontophorinfp, or partridges, of America, 

 J. Gould on the, 1844, 61. 



Odostomia, a genus of gasteropodous mol- 

 lusks, J. G. Jeffreys on the recent species 

 of, 1848, 79. 



CEnanthe crocata. Dr. Pickells on the dele- 

 terious effects of, 1843, 81. 



Oidium Tuckeri, or grape disease, Dr. A. P. 

 Price on pentasulphate of calcium as ar 

 means of preventing and destroying the, 

 1853, 46. 



Oil of assafoetida, Prof. Tilley and Dr. Mac- 

 lagan on the, 1845, 33. 



, bone-, Dr. T. Anderson on the products 



of, 1851, 43. 



, Croton, Dr. Newbiggin on its effect in 



nervous disorders, 1840, 156. 



, dugong, J. S. Brazier on, 1859, 256. 



, new, for lubricating machinery, J. J, 



Hawkins on a, 1843, 99. 



— — of Spireea ulmaria, Dr. Ettling on, 

 1840, 78. 



test, J. Nasmyth on an, 1849, 124. 



Oils obtained from Matias bark. Dr. Mac- 

 kay on, 1839, 61. 



, blue. Sir D. Brewster on their action 



upon light, 1843, 8. 



Oiseaux, prqjet d' observations annuelles sur 

 la p6riodicite des, 1841, 73. 



Oithona, a new genus of nudibranchiate 

 mollusca, J. Alder and A. Hancock's de- 

 scription of, 1851, 74. 



Omentum, Mr. Dick on the use of the, 1834, 

 683. 



Oolite of the neighbourhood of Stamford^ 

 Capt. Ibbetson and Prof. Morris on the, 

 1847, 128. 



, on the basement beds of the, by Prof^ 



J. Buckman, 1856, 64. 



, inferior, on the occurrence of upper 



lias Ammonites in the (so-called) base- 

 ment beds of the, by Dr. T. Wright, 1856, 

 80. 



• , inferior, near Stroud, on a new spe- 

 cies of Pollicipes in the, by Rev. P. B. 

 Brodie, 1856, 64. 



, great, inferior oolite, and lias in the 



neighbourhood of Grantham, Rev. P. B. 

 Brodie on the, 1850, 74. 



, great, at Stonesfield, Oxfordshire, E. 



Hull on the thickness of the formations 

 below the, 1860, 81. 



— — , middle, of the neighbourhood of Cam- 

 bridge, Rev. Prof. Sedgwick on the, 1845, 



43- 



Oohtes, lower, of Oxfordshire, J. F. White- 

 aves on the invertebrate fauna of the, 

 1860, 104. 



Oolitic or Jurassic series in Russia, Sir R. I. 

 Murchison on the, 1840, ic8. 



and carboniferous systems in York- 

 shire, Prof. Phi lips on the peculiar cha- 

 racter of the, 1831-32, 56. 



formations on the Great Western Rail- 

 way, at the west end of Sapperton tunnel, 

 Capt. Ibbetson on sections of the, 18 i 6, 61. 



, liassic, triassic, and Permian forma- 

 tions, E. Hull on the south-easterly at- 

 tenuation of the, 1856, 67. 



Opal, on the cause of the colours in, by Sir 

 D. Brewster, 1844, 9. 



