SECTIONS. — INDEX OF SUBJECTS. 



297 



Pterodactyles of the coprolite-bed near Cam- 

 bridge, Eev. J. B. P. Dennis on the mode 

 offlightof the, 1860, 76. 



Pteronura Sambachii, notice of, 1837, 100. 



Pterotheca, a new genus of Silurian fossils, 

 J. W. Salter on, 1852, 61 ; P. transversa 

 and P. corrugata, 61. 



Pterygotus, great, of Scotland, J. W. Salter 

 on the, 1856, 75. 



— — and Pterygotus beds of Great Britain, 

 D. Page on the, 1855, 89. 



Ptychodus latissimus, Prof. Owen on the 

 structure of the tooth of, 1838, 140. 



Puccinium graminis, notice of, 1841, 73. 



Pulley, locomotive differential, J. I. Haw- 

 kins on the, 1833, 424. 



Pulleys, expanding, Mr. Coombe on, 1858, 

 209. 



Pulmogrades, J. Price on the embryogeny 

 of, 1846, 86. 



Pulmonifera, terrestrial. Prof. E. Forbes on 

 the distribution of, in Europe, 1838, 1 12. 



Pulse, differential, Sir J. Murray on the, 

 1835, 98. 



Pulvermacher's patent portable hydro-elec- 

 tric chain battery, W. H. Walenn on the 

 construction and principles of, 1851, 52. 



Pump, on the bucket of a, in use in Sweden, 

 1838, 159. 



, centrifugal, J. G. Appold on a, 1849, 



110. 



, centrifugal, and windmill, for drain- 

 age and irrigation, 1855, 210. 



, for drawing up water by the power 



of a jet, Prof. J. Thomson on a, 1852, 

 130. 



■ , jet, on apparatus constructed to de- 

 termine the efficiency of the, with results, 

 by Prof. J. Thomson, 1853, 130. 



, "Treffos," J. Williams on the, 1837, 



129. 



• and steam-engine, on two combinations 



of the, for raising water, 1858, 208. 



Pumping water, steam-engine for, 1833, 421. 



Pumps, centrifugal. Prof. J. Thomson on 

 some properties of whirling fluids, with 

 their application in improving the action 

 of, 1852, 130. 



Purbecks, Dorsetshire, Prof. E. Forbes on 

 the succession of strata and distribution 

 of organic remains in the, 1850, 79. 



Pm'kinje's experiment on the eye. Sir D. 

 Brewster and Prof. Wheatstone on, 1831- 

 32, 551. 



Purple dye obtained from coal-tar, W. H. 

 Perkin on the, 1858, 58. 



Purpura hsemorrhagica, T. S. Wells on a 

 case of, 1845, 85. 



Purpura lapillus, C. W. Peach on the nidus 

 and growth of the, 1842, 66. 



— — lapillus. Dr. W. B. Carpenter on the 

 development of the embryo of, 1854, 108. 



Purpurate of ammonia. Prof. Gregory on a 

 new process for preparing, 1840, 74. 



Pycnogonidge, on a form of parasitism 

 among the, by Prof. Allman, 1859, 143. 



Pycuonotus chrysorrhoeus, shot near Water- 

 ford, 1843, 71. 



Pylorus : Prof. Ketzius on the Antrum py- 

 lori in man and animals, 1855, 132. 



Pyramids, H. Perigal on the probable mode 

 of constructing the, 1844, 103. 



Pyrites, artificial, containing cubical and 

 octahedral crystals, 1834, 582. 



, iron, crystals of, 1836, 77. 



, iron, A. Gages on some transforma- 

 tions of, in connexion with organic re- 

 mains, 1860, 79. 



, yellow copper, on the torrefaction of, 



1831-32, 78. 



Pyroacetic spirit, Dr. Kane on compounds 

 obtained from, 1837, 52. 



Pyrosclerite, Connemara, analysis of, by 

 Prof. Rowney, 1860, 71. 



Pyroxylic spirit, M. Scanlan on a fluid ob- 

 tained in manufacturing, 1835, 40. 



spirit, Dr. Dalton's analysis of, 1835, 



44. 



Quadratic radicals. Prof. Sylvester on a 

 generalization of Poncelet's theorems for 

 the linear representation of, 1860, 7. 



Quadrumana: Prof. Owen on the anthropoid 

 apes, 1854, iii. 



Quantities, imaginary, on conjugate func- 

 tions as tending to illustrate the doctrine 

 of, by Sir W. E. Hamilton, 1834, 519. 



Quarries, granite, of Dartmoor, W. Johnson 

 on the, 1841, 105. 



Quartz, J. M'^Cullagh on the laws of double 

 refraction in, 1836, 18. 



, auriferous. Dr. J. Blake on the com- 

 parative richness of, extracted at different 

 depths from the same lode, 1853, 50. 



, crystals of, within mica, amethyst, 



and topaz. Sir D. Brewster on, 1853, 3. 



Quartzite, gneiss, and red sandstone in the 

 north-west Highlands, Prof. Nicol on the 

 relations of the, 1859, 119. 



Quaternions, Sir W. R. Hamilton on a 

 theory of, 1844, 2. 



, Sir W. R. Hamilton on a system of, 



1845, 3. 



, on an extension of, by Sir W. R. Ha- 

 milton, 1854, r. 



, on an application of, to the geometry 



of Fresnel's wave-surface, by Sir W. R. 

 Hamilton, 1859, 248. 



Quetelet's (Prof.) investigations relating to 

 the electricity of the atmosphere, Prof. 

 Wheatstone on, 1849, 1 1. 



Quinine, V. Hurtado on the barks from 

 which it is obtained, 1860, 162. 



, Prof. Stokes on the optical properties 



of a recently discovered salt of, 1852, 1 5. 



Radclyffe observatory, E. J. Dent on the 

 mean daily rate of the transit-clock in 

 the, 1839, 28. 



' Radesyge,' of Scandinavia, Dr. Hancock on 

 the disease called, 1837, 128. 



Radiata, hydroid: on the reproductive organs 



