SECTIONS. INDEX OF AUTHORS, 



169 



Peach (C. W.), notice of the natural print- 

 ing of sea-weeds on the rocks in the vici- 

 nity of Stromness, 1856, 90. 



, discovery of fossils in the limestone 



of Durness, 1857, 82. 



on some peculiar forms of spines 



found on two species of the spinigrade 

 starfishes, 1858, 128. 



on fossil fish, new to the old red sand- 

 stone of Caithness, 1859, 120. 



• notes on different subjects in natural 



history, 1859, 155. 



on the zoophytes of Caithness, 1859, 



, a new form of ichthyolite discovered 



by, 1860, 78. 

 * on the statistics of the herring fishery, 



1860, 120. 

 Peacock (A.) on decimal fractions, 1842, 10. 

 Peacock (Rev. Dr. Gr.) on the report of the 



Commissioners for the restoration of lost 



standards of weights and measures, and 



on their proposal for the introduction of 



a decimal system, 1842, 8. 

 on the tenure of land in the island of 



Madeira, 1849, 26. 

 ^Pearsall (T. J.) on the action of water 



upon lead, 1837, 58. 



on masses of salt discovered in the 



lowest portions of guano on the island of 

 Ichaboe, 1845, 39. 



on changes observed in wood from the 



submerged forest at Wawne, in Holder- 

 ness, 1853, 45. 



on crystals from the sea-coast of 



Africa, 1853, 45. 



on lime flowers, or peculiarly-formed 



substances from the brickwork of one of 



the reservoirs of the Hull waterworks, 



1853, 45. 

 *Pearson (W. R.) on the compounds of 



chromium and bismuth, 1856, 58. 

 Peckitt (H.) on earthworms and larvae of 



an undescribed species found in draining 



a field, 1858, 129. 

 Peebles (Mr.) on the expressibility of the 



roots of algebraic equations, 1840, 54. 

 Pengelly (W.) on the Beekites foimd in 



the red conglomerates of Torbay, 1856, 



74- 

 * on an ossiferous cavern at Brixham, 



near Torquay, 1858, 106. 

 * on an ichthyolite found in the Devo- 



nion slates of E. Cornwall, 1858, 223. 

 *■ on the trilobite found at the Knoll 



Hill, Newton Abbott, 1858, 224. 

 — — on the ossiferous fissures at Oreston 

 - near Plymouth, 1859, 121. 

 • on the chronological and geographical 



distribution of the Devonian fossils of 



Devon and Cornwall, 1860, 91. 

 Penny (Prof. F.) on the action of nitric 



acid on the chlorates, iodates, and bro- 



mates of potassa and soda, 1840, 79. 

 • on a new salt obtained from iodine 



and caustic soda, 1840, 80. 



Penny (Prof. F.) on a new and ready pro- 

 cess for the quantitative determination of 

 iron, 1850, 58. 



on the estimation of iodine, 1852, 37. 



on a simple volumetric process for the 



valuation of cochineal, 1855, 68. 



on the manufacture of iodine and 



other products from kelp, 1855, 69. 



on the composition and phosphores- 

 cence of plate-sulphate of potash, 1855,^ 

 69. 



Penny (Rev. W. G.) on certain planetary 

 perturbations, 1857, 27. 



Pentland (J. B.) on the ancient inhabit 

 tants of the Andes, 1834, 623. 



on the position of the city of Cuzco in 



Peru, 1838, 99. 



Percy (Dr. J.), contributions to the che- 

 mistry of diabetes, 1845, 39. 



on a gas furnace for organic analysis, 



1846, 49. 



* on a specimen of artificial Humbold- 



tite or melilite in large crystals, 1847, 57. 



* on a new potash apparatus for organic 



analysis, 1847, 57. 



on some of the alloys of tungsten, 



1848, 57. 



on copper containing phosphorus, and 



experiments on the corrosive action of 

 sea-water on some varieties of copper, 



1849, 39. 



Peretti (Prof.) on the bitter principles of 

 some vegetables, 1844, 84. 



Perigal (H., jun.) on the probable mode of 

 constructing the Pyramids, 1844, 103. 



Perkin (W. H.) on the purple dye obtained 

 from coal-tar, 1858, 58. 



*Perreaux (M.) on a dynamometric ma- 

 chine for measuring the strength of textile 

 fabrics and other substances, 1852, 128. 



Perry (Dr.) on typhus fever, 1835, loi. 



on local inflammation, the effusion of 



coagulable lymph, and the formation of 

 pus, 1840, 159. 



on contagious fevers, 1840, 160. 



Perry (Mr.), notice of the atmospheric 

 railway, Kingstown and Dublin line, 1843, 



lOI. 



Petermann (A.), hydrography of the Bri- 

 tish Isles, 1848, 73. 

 on the distribution of the population 



of Great Britain and Ireland, 1848, 113. 

 on the temperature of the British Isles, 



and its influence on the distribution of 



plants, 1849, 26. 

 on the distribution of animal life in 



the Arctic regions, 1852, 112. 



on the interior of Australia, 1853, 89. 



*Petherick (Consul), exploration of the 



White Nile, 1859, 265. 

 * on his proposed journey from Khartum 



in Upper Egypt to meet Capt. Speke on 



or near Lake Nyanza of Central Africa, 



1860, J 74. 

 Petrie (W.) on the results of an extensive 



series of magnetic investigations, inclu-- 



