228 



I'asley (Lieut.- Gen. Sir C.) on a plan for 

 simplifying and improving the mea- 

 sures, weights, and monies of this coun- 

 try, without materially altering the 

 present standards, 184. 



Patent laws, on the operation of the, 208. 



Paterson (Rev. Dr.) on the cultivation of 

 sea-sand or sand-hills, 118. 



Patterson (Mr.), zoological diagrams pre- 

 pared by him for the Government de- 

 partment of science and art, 118. 



Peach (Charles) on fossils in the crystal- 

 line rocks of the North Highlands, 85. 



Pennsylvania, on some reptilian footprints 

 from the carboniferous strata of, 95. 



Penny (Dr. F.) on a simple volumetric 

 process for the valuation of cochineal, 

 68 ; on the manufacture of iodine and 

 other products from kelp, 69 ; on the 

 composition and phosphorescence of 

 plate-sulphate of potash, ib. 



" Persia," description of the launch of the 

 steamer, 208. 



Phanerogamous jjlants, on impregnation 

 in, 106. 



Phillips (Prof) on certahi trap dykes in 

 Arran, 94. 



Phosphorescence of plate-sulphate of pot- 

 ash, on the composition and, 69. 



Phosphorus in organic compounds, on a 

 method of determining sulphur and, in 

 one operation, 73. 



Photo-barograph, on the detection and 

 measurement of atmospheric electri- 

 city by the, 40. 



Photochemical researches with reference 

 to the laws of the chemical action of 

 light, 48. 



Photographic process, on obtaining litho- 

 graphs by the, 69. 



Photographic researches, on, 48. 



Photographs, on the fi.\ing of, 7 ; exhibi- 

 tion of histological and natural-history 

 objects on glass, by Dr. Redfern, US. 



Physiology, 118. 



Pigments, on the composition of two mi- 

 neral substances employed as, 70. 



Plants, on the remains of, in calcareous 

 spar, from King's County, Ireland, 9 ; 

 fossil, from the old red sandstone of 

 Caithness, 85 ; an attempt to classify 

 the flowering, of Great Britain, accord- 

 ing to their geognostic relations, 99 ; 

 specimens illustrating the distribution 

 of, in Great Britain, 100; on the in- 

 fluence of light on the germination of, 

 103 ; on impregnation in phaneroga- 

 mous, 106. 



Platinum, on the extraction of metals 

 from the ore of, 63. 



Poey (Sefior Andres) on hurricanes in the 

 West Indies and the North Atlantic 

 from 1493 to 1855, 150. 



Polynesia, on the ethnology of, 141. 



Polystereopticon, on the, 10. 



Polyzoa, Hippocrepian,on the signification 

 of the so-called ova of the, and on the 

 development of the proper embryo in 

 these animals, 118. 



Poole (H.) on a recent geological survey 

 of the region between Constantinople 

 and Broussa, in Asia Minor, in search 

 of coal, 94. 



Portugal, collection of ferns from, 106. 



Portuguese possessions of S.W. Africa, on 

 the, 147. 



Potash, on the use of phosphate of, in a 

 salt-meat dietary, 63 ; on thejcompo- 

 sition and pliosphorescence of plate- 

 sulphate of, 69. 



Potato crops, on the preservation of the, 54. 



Pottery, on inscriptions in unknown cha- 

 racters on Roman, discovered in En- 

 gland, 146. 



Prevost(Capt.), account of the exploration 

 of the Isthmiis of Darien under, 148. 



Price (David S.) on the chemical compo- 

 .sition of some iron ores called "brass" 

 occurring in the coal-measures of S. 

 Wales, 66. 



Price (John) on the geology of the district 

 of Great and Little Ormeshead, 94. 



Price (J.), notes on animals, 117. 



Projectiles, on, 203 ; on the mutual in- 

 fluence of capillary attraction and 

 motion on, 206. 



Pterygotus and Pterygotus beds of Great 

 Britain, on the, 89. 



Pump, on a centrifugal, erected in Ja- 

 maica, 210. 



Quartz formation, on the auriferous, of 

 Australia, 81. 



Quaternion, on the conception of the, and 

 on its application to the theory of in- 

 volution in space, 7. 



Railroad, on the superficial deposits laid 

 open by the cuttings on the Inverness 

 and Nairn, 78. 



Railways and their varieties, on, 202. 



Rain, on the fall of, at Arbroath, 30. 



Rainbow seen after sunset, on a, 38. 



Rain-falls, on, for a series of years at 

 home and in foreign countries, 45. 



Ramsay (Prof. A. C.) on a process for 

 obtaining lithographs by the photogra- 

 phic process, 69 ; on the commence- 

 ment and progress of the geological 

 survey in Scotland, 95. 



