330 
GENERAL INDEX. 
*Polariscope, demonstrating, J. F. Taylor 
on a defect in the, with a simple and 
effective remedy, 1866, 28 
-a new form of, Prof. W. G. Adams 
on, 1878, 486 
^Polarised gas, thermal effusion and the 
limiting pressure in, G. J. Stoney on, 
1885, 904 
* -light, an instrument for the de¬ 
tection of, P. Braham on, 1880, 502 
-light, Prof. Jellett on a method 
by which the formation of certain 
definite chemical compounds may be 
optically established by, 1869, 23 
-light, the rotatory power of several 
essential oils for, Dr. J. E. De Yrij 
on, 1865, 40 
* -light, the spectrum of, A. Waugh 
on, 1861, 191 
--light, theory of reflection and refrac¬ 
tion of, A. Cornu on a new geometrical 
theorem relative to the, 1866, 9 
* . . rays at opposite ends of the spec¬ 
trum, Prof. John H. Jellett on a fluid 
possessing opposite rotatory powers 
for, 1866, 12 
Polariser, a new, devised by Mr. Ahrens, 
Prof. S. P. Thompson on, 1885, 912 
^Polarising apparatus, a description of 
Spottiswoode’s pocket, by W. Ladd, 
1876, 41 
-prism, a new, Prof. S. P. Thompson 
on, 1881, 563 ; see 1885, 912 
-prisms, the cutting of, Prof. S. P. 
Thompson on, 1886, 520 
Pole (Prof. W.), description of the 
large gyroscope used by Sir W. Arm¬ 
strong in his investigations on rifled 
projectiles, 1863, 177 
- on the rainfall of the British Isles, 
1870, 170 ;1871, 98 ;1872, 176 ; 1873,257 
——- on Babbage's analytical machine, 
1878, 92 
Political economy, W. S. Jevons on a 
general mathematical theory of, 1862 , 
158 
- —— economy, H. D. Macleod on the 
definition and nature of the science of, 
1862,159 
* -economy as applied to the employ¬ 
ment of women, E. Lydia Becker on 
some maxims of, 1871, 201 
* -economy, pauperism, the labour 
question, and the liquor traffic, William 
Hoyle on, 1871, 212 
--economy and the laws affecting the 
prices of commodities and labour, F. 
P. Fellows on, and on strikes and lock¬ 
outs, 1874, 203 
* -economy, the definitions of, Prof. 
Maguire on, 1878, 667 
* -partition of Africa, A. S. White on 
the, 1890, 892 
Pollen-grains, A. W. Bennett on the 
form of, in relation to the fertilisation 
of flowers, 1874, 133 
Polli (Dr.) on the antiseptic properties 
of the sulphites, 1867, 103 
^Pollution of rivers, Rev. R. Thomson on 
the prevention of, 1876, 70 
-the evils arising from the, Gen. Sir 
J. E. Alexander on, 1883, 605 
Polyatomic cyanides, Thomas Fairley on , 
1868, 519 
fPolycyanides, Thomas Fairley on the 
action of hydrogen on, 1864, 26 
Polygamy, H. Clarke on, as affecting 
population, 1872, 224 
Polymerisation, the spontaneous, of vola¬ 
tile hydrocarbons at the ordinary at¬ 
mospheric temperature, Prof. Sir H. 
E. Roscoe on, 1885, 967 
Polymorphism of Alcyonaria, Prof. M. 
Marshall on the, 1883, 529 
-in the fructification of lichens, Dr. 
W. Lauder Lindsay on, 1867, 89 
-type-variation and, in their relation 
to Mr. Darwin’s theory of the origin 
of species, B. T. Lowne on, 1868, 104 
Polynesian race, C. S. Wake on the, 1879, 
390 
Potynesians and their origin, C. S. Wake 
on the, 1883, 573 
-—— and the Papuans, C. S. Wake on 
the, 1881, 696 
- and Papuans, Rev. G. Brown on, 
1886, 842 
Polynomials, J. J. Walker on the condi¬ 
tions of the resolvability of homoge¬ 
neous algebraical, into factors, 1863, 3 
Polypodium vulgare. Prof. W. R. M e Xab 
on a variety of, 1875, 158 
Polyps, development of the hydroid, Cla- 
vatella and Staurulia , Rev. T. Hincks 
on the 1861, 145 
- hydroid, production of similar 
medusoids by certain, belonging to 
different genera, Rev. T. Hincks on the, 
1862, 107 
*Polypterus Birchii, the osteology of, 
Prof. R. H. Traquair on, 1870, 143 
- niloticus, Prof. Owen on the homo¬ 
logies of the bones of the head of the, 
1862, 118 
Polystichum angulare, var .pulcherrimum, 
notes on apospores in, by Prof. F. O. 
Bower, 1886, 700 
Polyzoa, British. Joshua Alder on new. 
1863, 97 
*-the budding of, Prof. A. C. Haddon 
on, 1883, 429 
J -the use of the chitinous elements 
or appendages of the Cheilostomatous, 
in the diagnosis of species, G. Busk 
on, 1881, 662 
- fossil, report on : — Carboniferous, 
1880, 76 ; 1881, 161 ; Jurassic {British 
area only'), 1882, 249 ; Cretaceous 
