GENERAL INDEX 
417 
Tertians, F. W. Newman on curves of 
the third degree, here called, 1869, 
io ; curvature of surfaces of the second 
degree, F. W. Newman on, 13 
Tertiaries, the Lower, of East Suffolk, the 
range of, W. H. Dalton on, 1880, 575 
^Tertiary basalt-rock dykes in Scotland, 
R. L. Jack on, 1876, 92 
-coal-field of Southern Chile, G. A. 
Lebour and W. Mundle on the, 1870, 78 
* -deposits of Victoria, H. M. Jenkins 
on the, 1868, 70 
- {Miocene) flora, <fc., of the basalt 
of the North of Ireland, report on the, 
1879, 162 ; 1880, 107 ; 1881, 152 ; 1883, 
209 
- and Secondary beds of the United 
Kingdom, report on the fossil plants 
of the, 1885, 396 
- fossils, newer, in Sicily and Cala¬ 
bria, J. Gwyn Jeffreys on, 1870, 76 
-period, the master-divisions of the. 
Prof. W. Boyd Dawkins on, 1883, 490 
- and Quaternary deposits in the 
Eastern Counties, Rev. J. Gunn on, 
with reference to periodic oscillations 
of level and climate, 1867, 60 
* - strata, of the Bohusliin district, 
Dr. A. W. Malm on the Upper, 1863, 
191 
*Testacea 3 or conchiferous Molluscs, the 
uses of, in nature, science, and the 
arts, B. W. Gibsone on, 1889, 642 
Testacella Haliotidea , some newly-dis¬ 
covered localities of, E. J. Lowe on, 
1883, 549 
tTesting iron, J. Swinburne and W. F. 
Bourne on, 1890, 753 
-materials, autographic apparatus for 
machines for, Prof. W. C. Unwin on, 
1885, 1199 
Testings of large objectives, H. Grubb on 
the, 1876, 36 
*Tetanometer, Dr. J. G. McKendrick on 
a new form of, 1871, 140 
*Tetractinellidce, observations on the mi¬ 
nute structure of the, by Prof. Sollas, 
1886, 710 
Tetravalency of oxygen, evidence of the, 
derived from the constitution of the 
azonaphthol - compounds, Prof. R. 
Meldola on, 1888, 635 
Texas, Eastern, Prof. Mallet on the oc¬ 
currence of native sulphuric acid in, 
1872 ,78 
Thacher (E.), description of a cylindri¬ 
cal slide rule or calculating apparatus, 
1884, 656 
Thallium, I. Lowthian Bell on, 1863, 34 
- W. Crookes on the extraction of, 
from the flue-dust of pyrites-burners, 
1863, 41 
-W. L. Scott on some probable new 
sources of, 1861, 41 
Thallium trisulphide, the electrolysis of, 
Dr. J. H. Gladstone and W. Hibbert on, 
1888, 349 
Thallophytes, a reformed system of ter¬ 
minology of the reproductive organs 
of, A. W. Bennett and G. Murray on, 
1880, 600 
^Thames, John Glover on the decline of 
shipbuilding on the, 1869, 191 
- Valley at Acton and Ealing, Col. 
A. Lane-Fox on the discovery of flint 
implements of the Palaeolithic type in 
the gravel of the, 1869, 130 
Thane (Prof. G. D.) on the facial charac¬ 
teristics of the races and principal 
crosses in the British Isles, 1883, 306 ; 
1884, 294 
Thanet sand, W. Whitaker on the occur¬ 
rence of, in the S.W. part of Suffolk 
(Sudbury), 1873, 92 
Thasos, the ancient marble commerce of, 
J. Theodore Bent on, 1887, 201 
Theatre hygiene, W. H. Collins on, 1890, 
773 
Theory of functions, elementary demon¬ 
stration of a fundamental principle of 
the, by Prof. P. Mansion, 1876, 26 
- of numbers, report on the, by H. J. 
Stephen Smith, 1861, 292 ; 1862, 503 ; 
1863, 768 ; 1865, 332 
- of numbers, J. W. L. Glaisher on 
certain propositions in the, deduced 
from elliptic-transcendent identities, 
1873, 10 
Thermal conductivities of certain rocks, 
notes by Prof. Herschel of some ex¬ 
periments on the, 1873, 40 
- conductivities of certain rocks, report 
on experiments to determine the, show¬ 
ing especially the geological aspects of 
the investigation, 1874, 128 ; 1875,54; 
1876, 19 ; 1877, 90 ; 1878, 133 ; 1879, 
58 ; 1881, 126 
- conductivity of iron, Principal J. 
B. Forbes's experiments on the, 1869 ,175 
- conductivity of metals, Prof. P. 6f. 
Tait on, 1871, 97 
* - conductivity, Prof. G. Forbes on, 
1873, 40 
* - effusion and the limiting pressure 
in polarised gas, G. J. Stoney on, 1885, 
904 
* - equivalents: 1. Fermentation; 2. 
Oxides of chlorine, J. Dewar on, 1870, 54 
- equivalents of the oxides of chlorine, 
preliminary report by J. Dewar on the, 
1871, 193 
- resistance of liquids, Frederick 
Guthrie on the, 1868, 15 
-springs in the fens of Cambridge¬ 
shire, F. W. Harmer on some, 1870, 74 
- water of the Clifford amalgamated 
mines of Cornwall, W. W. Smyth on. 
the, 1864, 70 
E E 
