SECTIONS. INDEX OF SUBJECTS. 



293 



Plants, on the ashes of, 1845, 34, 35, 36, 37. 

 — — , Rev. J. B. Rcade on the origin of 



the solid materials in the ashes of, 1837, 



103. 

 , Dr. Dalton on the non-production of 



carbonic acid by, 1837, 58. 

 , on urea as a direct source of nitrogen 



to, by Dr. C. A. Cameron, 1857, 44. 

 , assimilation of nitrogen by, J. B. 



Lawes, Dr. Gilbert, and Mr. Pugh on the, 



1857, 51. 

 , nitrates in, Prof. Sullivan on a process 



for the determination of, 1857, 58. 



, on the presence of fluorine in, 1849, 43. 



, Dr. S. Macadam on the presence of 



iodine in, 1854, 72. 

 , R. Ball on their destruction by animal 



odour, 1841, 76. 

 , W. B. Randall on common salt as a 



poison to, 1848, 58. 

 , results of experiments of salt on, by 



Dr. Voelcker, 1850, 114. 

 , British, J. Hogg on some variations 



of, 1857, 96. 

 , M. T. Masters on the normal and ab- 

 normal variations from an assumed type 



in, 1860, 112. 

 : on a peculiarity in the Protococcus 



nivalis, 1848, 86. 

 . , on an apparently undescribed state of 



the Palmelleae, and on gemmation in the 



lower tribes of, by G-. H. K. Thwaites, 



1848, 87. 

 : on the parasitic character of Rhinan- 



thus crista-galli, 1848, 84. ' 

 , notice of a monstrosity of Bellis per- 



ennis, by Prof. Dickie, 1852, 66. 

 ■ : on the transmutation of ^gilops into 



Triticum, 1852, 68. ^ 

 , report of committee for registration 



of periodic phenomena in, 1853, 70. 

 , comparison of the periods of the flower- 

 ing of, in the Botanic Garden of Belfast 



and the Jardin des Plantes at Paris, 



1846, 90. 



: on the flowering of Victoria regia in 



the Royal Botanic Garden, Glasgow, by 

 P. Clark, 1855, 102. 



: experiments on the roots of theCanna 



indica, with reference to their value in an 

 economical point of view, by W. T. Iliff, 



1847, 85. 



: Prof. Allman on a peculiarity in the 



structure of the stomata of Ceratopteris 



thalictroides, 1847, 81. 

 : on the properties and composition of 



the leaves of the cocoa, by Prof. J. F. W. 



Johnston, 1853, 43. 

 : on the true nature of the tendril in 



the cucumber, by Dr. T. B. Salter, 1846, 



88. 

 , on the temperature of the flowers and 



leaves of, by E. J. Lowe, 1859, 135. 

 and trees, on the aversion of certain, 



to the neighbourhood of each other, by 



Dr. G. Buist, 1859, 133. 



Plants for a botanic garden, Mr. Niven on 



the arrangement of, 1835, 80. 

 , cycadaceous, grown in England, 1859, 



142. 

 , succulent, Dr. Macartney on a method 



of preserving, 1836, 100. 



in sea-water, R. Warington on the 



growth of, 1854, 103. 



, Capt. Ibbetson on electrotyping, 1845, 



74- 



, on those which form the principal 



part of the Irish turf-bogs, by D. Moore, 

 1857, 97. 



, fossil. Prof. Goppert's tabular view 



of, 1845, 48. 



, fossil, from Devonshire and Pem- 

 brokeshire, Rev. D. Williamson, 1835, 63. 



, fossil, of the "insect limestone" of 



the lower lias at Strensham, Worcester- 

 shire, Prof* Buckman on the, 1848, 66. 



, fossil, of Scotland, Hugh Miller on 



the, 1855, 83. 



, fossil, of the carboniferous period, in 



the Tarentaise, 1848, 64. 



, fossil, collected at Sunday River, Cape 



frontier, 1851, 68. 



of the New South Wales and Van 



Diemen's Land coal-fields, P. M'Coy on 

 the, 1847, 64. 



Plate glass, silvered, J. Nasmyth on bend- 

 ing it into mirrors, 1839, 7. 



glass, on the manufacture of, in Eng- 

 land, 1846, loi. 



Platina, Prof. Hare on a method of fusing, 

 1837, 41. 



, finely divided. Rev. Dr. Robinson on 



the influence it exerts on the electrodes of 

 a voltameter, 1846, 46. 



and tin, protochlorides of. Dr. Zane 



on some combinations of, 1835, 44. 



Platinum, Prof. T. Andrews on the atomic 



weight of, 1852, 33. 

 — — , on the extraction of metals from the 



ore of, by Prof. Fremy, 1855, 63. 

 , the combination of hydrogen and 



oxygen effected by, 1838, 68. 



and magnesia, and barytes and pla- 

 tinum, cyanurets of. Sir D. Brewster on 

 the optical properties of, 1850, 5. 



wire. Dr. W. Barker on electric cur- 

 rents passing through, 1835, 33. 



Platychserops Richardsonii, a new mammal, 

 from the London clay of Heme Bay, 

 1854, 80. 



Platygnathus rugosus, notice of, 1839, 75. 



Plecotus auritus. Prof. H. Carlile on the ear 

 of the, 1857, 117. 



Pleiocene deposits, newer, J. Smith on the 

 shells of the, 1838, 87. 



Pleistocene tract in the Isle of Man, Prof. 

 E. Forbes on a, 1840, 104. 



formation in Russia, Sir R. I. Mur- 



chison on the, 1840, 109. 



Plesiosaurus, E. Charlesworth on the dis- 

 covery of a large specimen of, at Kettle- 

 ness Cliff", Yorkshire, 1844, 49. 



