142 
Peach (C. W.) on the fossil geology of Corn- 
wall, 63. 
—— on the luminosity of the sea on the 
Cornish coasts, 80. 
Peacock (The Very Rev. G.) on the tenure 
of land in the island of Madeira, 26. 
Percy (Dr. John) on copper containing phos- 
phorus, with details of experiments on the 
corrosive action of sea water on some va- 
rieties of copper, 39. 
Perspective, on teaching, by models, 33. 
Petermann (Augustus) on the temperature 
of the British Isles, and its influence on the 
distribution of plants, 26. 
Phillips (John) on the therm-anemometer, 28. 
—— on tumuli in Yorkshire, 86. 
Philology of Africa, on certain additions to 
the ethnographical, 85. 
Phosphorescence of the British seas, on the 
animalcular source of the, and on the phe- 
nomena of vital, 81. 
Phosphoric phenomenonin a pondat Huggate, 
on June 11, 1849, on a, 29. 
Phosphorus, on the compounds of the halo- 
gens with, 38. 
, on copper containing, 39. 
, on the allotropic condition of, 42. 
in strata, and in all fertile soils, on the 
cause of the general presence of, 67. 
Photographic camera, improvement on the, 5. 
paper, on an improvement in the pre- 
paration of, 34. 
Photography in the Daguerreotype process, 
on the theory of the principal phenomena 
of, 35. 
Physics, 1. 
Pinions, on correct sizing of, 127. 
Pipes, chain, for subaqueous telegraphs, 132. 
Planets, on the application of graphical methods 
tothe determination ofthe perturbationsof, 1. 
Plant (John) on the discovery of beds of Keu- 
per sandstone containing zoophytes in the 
vicinity of Leicester, 64. 
Plants, on the temperature of the British Isles, 
and its influence on the distribution of, 26. 
, on the presence of fluorine in, 43. 
Population,labouring, statistical account ofthe, 
inhabiting the buildings at St. Pancras, 108. 
Porter (G. R.) on a comparative statement of 
prices and wages during the years from 
1842-49, 101. 
on the agricultural statistics of Ireland, 
104. 
Powell (Rev. Prof.) on a new equatorial 
mounting for telescopes, 2. 
on De Vico’s comet, 2. 
om some recent discussions relative to the 
theory of the dispersion of light, 8. 
on irradiation, 9. 
—— on luminous meteors, 29. 
Pring (Dr. J. H.) on the Noctiluca miliaris, 
the animalcular source of the phosphores- 
cence of the British seas; with a few ge- 
neral remarks on the phenomena of vital 
phosphorescence, 81. 











INDEX Il. 
Prussia, on the present state of electro-tele- 
graphic communication in, 133. 
Prussian statistics, on, 86. 
Pseudo-coprolites, on, 67. 
Pump, on a centrifugal, 110. 
Quaternions to geometry,/on some new appli- 
cations of, l. 
Quetelet’s (Prof.) investigations relating to 
the electricity of the atmosphere, on, 11. 
Railway axles, on the manufacture of the finer 
irons and steels as applied to, 115. 
Railways, on the cause and prevention of the 
oscillation of locomotive engines on, 116. 
Rainbow seen after actual sunset, on a, 16. 
Rankin (Rev. T.), meteorological observa- 
tions made at Huggate, Yorkshire, 29. 
on a phosphoric phenomenon in a pond 
at Huggate, on June 11, 1849, 29. 
on a singular atmospheric wave, in Feb. 
1849, 29. 
—— on magnetized brass, 29. 
Rawson (Robert) on elliptic integration, 3. 
—— on the friction of water, 3. 
on the oscillations of floating bodies, 5. 
Reeve (Lovell) on the discovery of a living 
representative of a small group of fossil Vo- 
lutes occurring in the tertiary rocks, 64. 
Retzius (Prof.) on a Finlandic vocabulary, 
86. 




on certain American, Celtic, Cimbric, 
Roman, and ancient British skulls, 86. 
Roads, on the superiority of macadamized, 
for streets of large towns, 129. 
Roberts (Richard) on the sheet-metal mould- 
ing machine, 126. 
on correct sizing of toothed wheels and 
pinions, 127. 
—— on the eccentric sheet-metal and wire- 
gauge, 128. 
on the influx and reflux of the tide being 
rendered available as agents for effecting 
the motions of clock-work, 128. 
Rockets, on the use of, in effecting a commu- 
nication with stranded vessels, 114. 
Rocks, tertiary, on the discovery of a living 
representative of a small group of fossil 
Volutes occurring in the, 65. 
Rogers (Professors W. B. and R. E.) on the 
decomposition and partial solution of mi- 
nerals, rocks, &c. by pure water and water 
charged with carbonic acid, 40. 
Rogers (Prof. W. B.), general sketch of Vir- 
ginia, with especial reference to the faults 
in the Alleghanies, 65. 
Rotary engine, on a new, 118. 
Russell (J. Scott) on recent applications of 
the wave principle to the practical con- 
struction of steam-vessels, 30. 
Rush (George) on observations of the baro- 
meter and thermometer, made during se- 
veral ascents in balloons, 29, 


Sabella alveolata, 73. 

