294 



SECTIONS. INDEX OF SUBJECTS. 



Pleisosaurus discovered in lias at the alum- 

 works at Kettleness, near Whitby, 1848, 

 78. 



, new, in the York Museum, Prof. Phil- 

 lips on a, 1853, 54. 



, on the atlas and axis of the, by L. 



Barrett, 1858, 78. 



Pleurodictyumproblematicum, aBritish fos- 

 sil, 1839, 69. 



Pleurotoma teres, new to the British seas, 

 1844, 64. 



PHosaurus, E. Damon on a paddle of, found 

 at Kimmeridge, 1860, 75. 



Ploughing-machines, on, 1853, 121. 



Plum, Prof. Robb on an anomalous form of 

 the, in the gardens of New Brunswick, 



1840, 148. 



Plumatella fruticosa. Prof. Allman on the 



locomotive larva of, 1847, 74. 

 — — repens, Dr. Allman on, 1843, 74. 

 Plumbago, A. Rose on the discovery of, in 



the island of Mull, 1850, 102. 

 Plumularia, observations on the genus, and 



on P. formosa, by Gt. Busk, 1850, 118. 



halecioides, a new species of Sertu- 



larian zoophyte, 1858, 126; P.similis, 128. 



Plymouth Breakwater, W. Stuart on the, 



1841, 99. 



Poinsot's theory of rotation. Prof. J. C. 

 Maxwell on an instrument to illustrate, 

 1856, 27. 



Points or atoms, J. K. Smythies on the mo- 

 tion of, 1839, 24. 



Poisoning, on the medical indications of, by 

 W. E. C. Nourse, 1856, 97. 



, E. R. Harvey on the mode of death 



by aconite, 1860, 133. 



by the vapours of burning charcoal. 



Dr. a. Bird on the, 1839, loi. 



Poisonous properties of the salts of lead, 



Dr. A. T. Thomson on the, 1831^2, 604. 

 Poisons, effects of, on the animal economy. 



Dr. Hodgkin and Dr. Riippell on the, 



1834, 681. 



, arsenical, W. Herapath on, 1836, 67. 



, contagions, and miasms. Prof. Liebig 



on, 1840, 72. 

 Poisson's (M.) theory of the constitution of 



the atmosphere. Sir J. W. Lubbock on, 



1837, 31. . 



theoretic anticipation of magnecry- 



stallic action. Prof. Tyndall on, 1852, 20. 



Polar clock or dial, Prof. Wheatstone's de- 

 scription of the, 1848, 11. 



expedition (Franklin's), Capt. Snow on 



the, and the possible recovery of its scien- 

 tific documents, 1860, 180. . 



Polarimeter or polariscope, Sir D. Brew- 

 ster's, 1842, 13. 



, Dr. F. Bernard on a, 1854, 6. 



Polarimetry, Dr. F. Bernard on, 1854, 4. 



Polariscope, simple, A. Pritchard on a, 1835, 

 112. 



, Goddard's, 1839, 8. 



Polarity, Sir D. Brewster on a new kind of, 

 in homogeneous light, 1838, 13. 



Polarity of light, new, Sir D. Brewster on a, 



1845, 7. 

 of light, G. B. Airy on a new apparent, 



1840, 3. 



of diamagnetic bodies. Prof. Tyndall 



on the, 1855, 22. 



Polarization, Rev. E. Craig on, 1836, 1 9. 

 , Sir D. Brewster on a new species of, 



related to the direction of the grooves in 



grooved surfaces, 1847, 32. 

 , on determining whether -the lumini- 



ferous vibrations are parallel or perpen- 

 dicular to the plane of, by the Abb6 



Moigno, 1857, 9. 

 , plane of. Prof. Jellett on a new in- 

 strument for determining the, 1860, 1 3. 

 , M. Verdet on the dispersion of the 



planes of, of the coloured rays produced 



by the action of magnetism, 1860, 54. 

 , J. T. Goddard on the use of the oxy- 



hydrogen microscope in exhibiting the 



phenomena of, 1839, 8. 

 of the atmosphere. Sir D. Brewster on 



the, 1847, 32. 

 of the atmosphere. Sir D. Brewster on 



some new phenomena in the, 1850, 6. 

 , atmospheric, Dr. F. Bernard on an 



atmopolarimeter for observations on, 



1854, 6. 

 , circula", Rev. Prof. Powell on appa- 

 ratus for applying, to chemical inquiries, 



1842, 32. 

 in liquids, circular, Prof. MacCuUagh 



on M. Laurent's attempt to explain the 



phenomenon of, 1844, 7. 

 of light, A. Pritchard' s apparatus for 



illustrating the, 1835, 112. 

 of light. Rev. Prof. ChaUis on a new 



theory of, 1847, i. 

 of light by rough surfaces and white 



dispersing surfaces. Sir D. Brewster on 



the, 1844, u. 

 of light, on the use of the amethyst 



plates in experiments on the, by Sir D. 



Brewster, 1858, 13. 

 , elliptic, Rev. Prof. Powell on the wave 



theory as connected with, 1839, 2. 

 , elliptic, in light, reflected from various 



substances. Rev. Prof. Powell on, 1843, 



9, 10. 

 of light, elliptic. Rev. Prof. Powell on 



certain points connected with, 1844, 7. 

 of light, elliptic, by metallic reflexion. 



Rev. Prof. Powell on, 1845, 6. 

 of light, elliptic, by reflexion. Rev. Prof. 



Powell .on certain cases of, 1846, 3. 



, elliptic, Mr. Dale 01, 1846, 5. 



Polarized light, Sir D. Brewster on the ac- 

 tion of crystallized surfaces on, 1836, 13. 

 light. Sir D. Brewster on the rings of, 



in specimens of decomposed glass, 1840, 6. 



light. Rev. Dr. Lloyd on the pheno- 

 mena of thin plates in, 1841, 26. 



light reflected and tiansmitted by thin 



plates, Rev. Dr. Lloyd on the affections of, 

 1859, 14. 



