328 
GEN Eli AL INDEX. 
Plants of the Coal-Measures, Prof. W. C. 
Williamson on some of the physio¬ 
logical and morphological features seen 
in the, 1876, 145 
* -collected by the voyager Dampier, 
Prof. Lawson on, 1873, 105 
* -colour in, during different stages 
of their development, Neil Stewart on 
the functions of, 1871, 131 
- the disappearance of native , from 
their local habitats,report on, 1887 ,130 ; 
1889, 435 ; 1890, 465 
*—— the essential elements of, T. Jamie¬ 
son on, 1885, 969 
-fossil, in the Cambrian ( Upper Loug- 
mynd) rocks, St. David’s, Dr. Hicks on 
the discovery of some, 1869, 89 
- fossil, of Halifax, report on the , 1S82, 
267 ; 1883, 160 ; 1887, 235 
—— fossil, of the Tertiary and Secondary 
beds of the United Kingdom, report on 
the, 1885, 396 ; 1886, 241 ; 1887, 229 ' 
-and gases, R. Garner on the reci¬ 
procal action between, 1863, 113 
* - inflorescence of, John Gibbs on 
the, 1862, 98 
-influence exerted by light on the 
functions of, Dr. Daubeny on the, 1861, 
141 
-the life and growth of, the relation 
of the percentage of carbonic acid in 
the atmosphere to, Rev. A. Irving on, 
1888, 661 
-migration of cultivated, with refer¬ 
ence to ethnology, John Crawfurd on 
the, 1866, 107 
-‘ mimicry ’ in, Prof. Thiselton Dyer 
on the so-called, 1871, 128 
-movements of water in, Prof. M'Xab 
on the, 1877, 105 
- photographing, Dr. Karl Koch on 
the necessity of, to obtain a better 
knowledge of them, 1868, 102 
-rare Scotch, Prof. J. H. Balfour on 
some, 1861; 86 ; 1867, 79 ; *1875, 156 
- roots of, absorbing power of the, 
Dr. Jessen on the, 1881, 147 
-roots of, Dr. Daubeny on the func¬ 
tions discharged by the, 1861, 141 
-roots of, Dr. Daubeny’s reply to the 
remarks of M. F, Marcet on the power 
of selection ascribed to the, 1862, 9 S 
- sapindaceous, Prof. Radlkofer on 
the structural peculiarities of certain, 
1868, 109 
-South European, in the West and 
South of Ireland, Prof. Hennessy on 
the possible introduction of, 1868, 9 S 
* -spiral ducts in, Neil Stewart on the 
intimate structure of, and their rela¬ 
tion to the flower, 1871, 131 
* -structural characters in relation to 
habitat in, A. S. Wilson on, 1877, 106 
Plarr (Dr. G.) on the establishment of 
the elementary principles of quater¬ 
nions on an analytical basis, 1882, 451 
*Platinum, C. W. Siemens on the electric 
conductivity of, as affected by the pro¬ 
cess of manufacture, 1868, 20 
Platycnemic men in Denbighshire, W. 
Bovd Dawkins and G. Busk on the dis- 
covery of, 1870, 148 
Player (J. H.), an accurate and rapid 
method of estimating the silica in an 
igneous rock, 1886, 471 
Playfair (Dr. Lyon) on the origin of 
muscular force in animals, 1866. 43 
- [Sir Lyon], Presidential Address at 
Aberdeen, 1885, 3 
- on the aid given by the Dominion 
Government and the Government of the 
United States to the encouragement of 
fisheries , and to the investigation of the 
various forms of marine life on the 
coasts and rivers of North America, 
1885, 479 
* -(Col. R. L.) on the hydrographical 
system of the freshwater hsh of Algeria, 
1871, 134 
-exploration of the Aures mountains, 
1875, 195 
-on travels in Tunis in the footsteps 
of Bruce, 1876, 183 
——- on the rediscoverv of lostXumidian 
marbles in Algeria and Tunis, 1885, 
1018 ; on the changes which have taken 
place in Tunis since the French protec¬ 
torate, 1105 
-[Col. Sir R. L.], a journey in Western 
Algeria, May 1886, 1886, 735 
-Tunis since the French protectorate, 
1888, 745 
-on some remarkable monuments in 
the neighbourhood of Tiaret in Algeria, 
1889, 668 
--Address to the Geographical Section, 
1890, 874 
Pleistocene age, W. Boyd Dawkins on 
the physical geography of the Medi¬ 
terranean during the, 1872, 100 
-deposits of the district around 
Liverpool, G. H. Morton on the, 1861, 
120 
—— deposits of the Vale of Clywd, 
Prof. T. McK. Hughes on the, 1886, 
632 
-mammals, additional remains of 
in Yorkshire, Rev. J. F. Blake on, 
1873, 75 
Plesiosauria, Simosauruspusillus (Fraas), 
a step in the evolution of the, Prof. H. 
G. Seeley on, 1881. 618 
Plesiosau'rus Australis, Prof. R. Owen on 
the remains of, from the Oolitic for¬ 
mation in the middle island of New 
Zealand, 1861, 122 
* -brain and skull in, H. Govier Seeley 
on some characters of the, 1866, 66 
