GENERAL INDEX. 
329 
Plesiosaurus , the mode of development of 
the young: in, Prof. H. Govier Seeley 
on, 1887, 697 
-new species of, from the Lias near 
Whitby, Dr. A. Carte and W. H. Daily 
on a, 1862, 68 
Fleur acanthus and Xenacanthus, the 
Palseozoic elasmobranch genera, resto¬ 
ration of the, by Dr. A. Fritsch, 1890, 
822 
*Pleuronectidee. Prof. Traquair on addi¬ 
tional researches on the asymmetry of 
the, 1868, 120 
* Pleuronema doliarium , note on, by Dr. 
J. Barker, 1870, 111 
Plimpton (Dr. R. T.) on the estimation 
of the halogens and sulphur in organic 
compounds, 1887, 669 
Pliocene beds of St. Erth, Cornwall, R. G. 
Bell on the, 1887, 718 
Plucker (Prof. J.) on spectrum anal} T sis, 
1863, 15 
* -on a new method in geometry, 1863, 
7 
-on complexes of the second order, 
1866, 6 
Plunkett (T.) on the exploration of 
some caves in the Limestone hills of 
Fermanagh, 1877, 76 
- on the exploration of the Fermanagh 
caves , 1878, 183 
-on an ancient settlement found 
beneath the surface of the peat in the 
coal-bog near Boho, co. Fermanagh, 
1880, 623 
Plutonic, and volcanic rocks of the 
Mourne Mountains and Slieve Croob, 
Prof. Hull and W. A. Traill on the 
relative ages of the granitic, 1871, 101 
Plymouth, Henry K. Bamber on the 
water-supply of, 1869, 60 
- the health of, T. Littleton on, 
1877, 180 
- the meteorology of, J. Merrifield 
on, 1877, 39 
-Hoe, the Drift of, J. H. Collins on, 
1877, 68 
* -the paleontology of, notes on, by 
R. N. Worth, 1877, 79 
-the roses of the neighbourhood of, 
T. R. Archer Briggs on, 1877, 103 
-and neighbourhood, the Government 
establishments of, R. N. Worth on, 
1877, 219 
— . Breakwater, R. C. Townsend on 
the, 1877, 219 
-Waterworks, G. D. Bellamy on the, 
1877, 201 
- Marine Biological Association, ar¬ 
rangements for assisting the, 1887, 59 ; 
1888, 94 ; *1889, 642 ; 1890, 444 
^Pneumatic distribution of power, Prof. 
A. Lupton on the, 1890, 954 
* -process, R. Mushet on the treatment 
of melted cast iron and its conversion 
into iron and steel by the, 1866, 147 
Pneumatic propulsion, M. Bergeron on a 
system of, 1866, 140 
-system as applied to telegraph 
purposes, the development of the, 
J. W. Willmot on, 1885, 1198 
* -tramway-car,W. D. Scott-Moncreiff 
on a, 1876, 233 
- transmission through tunnels and 
pipes, R. Sabine on, 1870, 227 
Pneumonia, Dr. John H. Bennett on 
statistics of, 1865, 144 
Podophylline as a cholagogue, observations 
on, 1868, 224 
*Pogonatum alpinum, exhibition of a 
specimen of, Prof. Dickson, 1877, 104 
POGSON (Norman) on three of the minor 
planets in 1860, 1862, 16 
Points and lines in space, Prof. A. Cayley 
on a correspondence of, 1870, 10 
* -in a plane, the aspects of, Prof. 
Halphen on, 1881, 538 
* -in a space, a connection between 
homographies in a straight line and, 
C. Stephanos on, 1881, 538 
* -and signals, W. Smith on a means 
of recording the movements of, 1875, 
252 
Poisoning, Dr. George Harley on,1862, 129 
Poisons. Report on the antagonism 
between the action of active substances, 
1872, 124 
-Dr. A. T. Machattie on the detec¬ 
tion of, by dialysis, 1861, 34 
-Dr. MTntosh, on experiments with, 
on young salmon, 1867, 102 
Polacanthus, Rev. W. Fox on a new 
Wealden saurian named, 1865, 56 
*Polar bodies, Prof. Weismann on, 1887, 
763 
* -expedition, suggestion for a new, 
with a proposed route, by Commander 
Cheyne, 1877, 40 
-exploration, Capt. Sherard Osborn 
on, 1872, 211 
* -planes of a point with respect to 
four quadric surfaces, W. Spottiswoode 
on the, 1881, 547 
Polarimeters, Prof. S. P. Thompson on 
twin prisms for, 1887, 585 
Polarisation of light. Relation entre les 
phenomenes de la polarisation rotatoire 
et les formeshemiedresou hemimorphes 
des cristaux a un ou deux axes op- 
tiques, par A. des Cloizeaux, 1862, 19 
-rotation of the plane of, by reflec¬ 
tion from a magnetic pole, Dr. J. Kerr 
on, 1876, 40 
- of small electrodes in dilute sulphuric 
acid, Dr. F. Richarz on the, 1888, 350 
-stress in gases, complete expansions 
for the conduction of heat and the, G. 
J. Stoney od, 1879, 256 
