SECTIONS. INDEX OF SUBJECTS. 



28a 



Newton's rings, an expression for the in- 

 tensity of the central spot of, by Prof. 



Stokes, 1848, 5. 

 — — rings. Prof. Stokes on the perfect 



blackness of the centre of, 1848, 7. 

 — rings, on the mode of disappearance 



of, in passing the angle of total internal 



reflexion, by Prof. Stokes, 1850, 19. 

 New Zealanders, Dr. Martin on the moral 



and intellectual character of the, 1845, 78. 

 Niagara cataract, remarks on the, 1844, 45. 

 Nicol's prism, a new polarizer resulting 



from a modification of, 1857, 5. 

 Nicotin and some of its combinations. Prof. 



E. Davy on, 1835, 38. 

 Niger and Tchadda rivers, on the expedition 



up the, by Dr. Baikie, 1855, 146. 

 Nile, Dr. Beke on the sources of the, in the 



Mountains of the Moon, 1848, 63. 

 Nitrate of lead, precipitated from water by 



nitric acid, 1835, 54. 

 with oxalate of lead. Prof. Johnston 



on a new compound of, 1837, 52. 

 of potassa, its action on the animal 



economy, 1838, 129. 

 ' of silver, Mr. Scan Ian on the blackening 



of, by light, 1838, 63. 



of silver as a caustic and therapeutic 



agent, Dr. R. D. Thomson on, 1838, 132. 



Nitrates in plants, on a process for the 



determination of the, by Prof. Sullivan, 



1857, 58. 

 Nitric acid. Dr. Daubeny on Cavendish's 



experiment respecting the production of, 



1846, 38. 



acid, J. Stein on a process for the 



estimation of, 1850, 62. 



acid, on a new method for the quanti- 

 tative estimation of. by Dr. Pugh, 1858, 64. 



— — acid, precipitation of nitrate of lead 

 from water by, 1835, 54. 



acid, Prof. Penny on its action on the 



chlorates, iodates, and bromates of potassa 

 and soda, 1840, 79. 



acid, on its action on naphtha, by Drs. 



Smith and Leigh, 1844, 33. 



acid. Dr. Gt. Bird on the products ob- 

 tained by its action on alcohol, 1838, 55. 



acid and alcohol, Dr. T. Thomson on 



the specific heats of, 1837, 43 



and acetic acids, on a method of ana- 

 lysis applicable to the quantitative estima- 

 tion of, by Dr. J. H. Gladstone, 1854, 

 68. 



• and hydrochloric acids. Dr. S. Mac- 

 adam on the presence of lead in, 1854, 72. 



■ acid and ammonia in rain-water, J. B. 



Lawes and Dr. J. H. Gilbert on the 

 amounts of, and method of estimating, 

 1854, 70, 164. 



Nitrogen, Rev. T. Exley on the specific gra- 

 vity of, 1838, 64. 



■ , Dr. Voelcker on the percentage of, as 



an index to the nutritive value of food, 

 1850, 64. 



— — , assimilation of,, by plants, J. B. Lawes, 



Dr. J. H. Gilbert, and Mr. Pugh on the,; 



1857, 51. 

 Nitrogen, on the annual yield of, per acre, in 



different crops, by J. B. Lawes and Dr. 



J. H. Gilbert, 1858, 52. 



in lignin, W. C. Jones on, 1836, 74. 



in mineral waters, W. West on, 1849, 



47- 

 — — in organic analysis. Prof. Bunsen on a 

 new mode of estimating, 1840, 77. 



in organic bodies, Dr. Will and Dr. 



Varrentrapp's method for determining 

 the amount of, 1841, 53. 



, chloride of, A. Gages on, 1857, 47. 



Nitroglycerine, Prof. De Vrij on, 1851, 52. 

 , Dr. J. H. Gladstone on, 1856, 52. 



and other xyloids. Dr. J. B. Edwards 



on, 1858, 47. 



Noctiluca miliaris. Dr. J. H. Pring on the, 



1849, 81. 

 Nomenclature for organic bodies, systematic^ 



G. C. Foster on a, 1857, 45. 

 — — , zoological, on, 1844, 78. 4- /Ig'TLJl^. h JoS, 

 and c.assification of the older palaeo- 

 zoic rocks of Britain, Rev. Prof. Sedgwick 



on the, 1853, 54. 

 Norantia, or Ascium of Guiana, notice of a 



new species of, 1836, 104. 

 Northern hemisphere, T. Hopkins on the 



influence of mountains on temperature 



in the, 1841, 28. 

 Notation, mechanical, H. P. Babbage on, 



1855, 202. 



Notodelphys, Prof. Allman on the develop- 

 ment of, 1847, 74. 



Notonecta, on the method of production of 

 sound by a species of, by Prof. Redfem, 

 1859, 173. 



Notonectidae, R. Ball on noises produced by 

 one of the, 1845, 64. 



Nucleobranchia, Prof. E, Forbes on the ad- 

 dition of the order, to the British mol- 

 luscous fauna, 1843, 72. 



Nucula Packeri, 1847, 72. 



Schomburgkii, 1847, 72. 



Nudibranchia, J. Alder on new species of, 

 1842, 69. 



Nudibranchiate mollusca, J. Alder and A. 

 Hancock on a new species, and new genus 

 and species of, 1851, 74. 



Number, on some properties of a series of . 

 the powers of the same, by J. P. Hen- 

 nessy, 1858, 4, 



Numbers, J. T. Graves on the theory of, 



1856, I. 



, prime and composite, on tlie double 



square representation of, by Prof. Syl- 

 vester, 1844, 2. 



Numerical notation, T. W. Hill on a sys- 

 tem of, 1845, 4. 



Nux vomica, on a method of extracting 

 strychnia and brucia from, without alco- 

 hol, by J. Horsley, 1856, 54. 



Nymphaeaceae, on the arrangement of the 

 air-canals in the, by M. T. Masters, 1854, 



