248 
GENERAL INDEX 
liquid, influenced by an electric current 
in the direction of propagation? by Lord 
Rayleigh , 1888, 341 
Light, the velocity of, in the chemical ele¬ 
ments, and on their crystalline form, 
Prof. Zenger on, 1872, 46 
--the velocity of, white and coloured 
Prof. G-. Forbes on, 1882, 441 
* -the velocity of, of different colours, 
Prof. G-. Forbes on, 1881, 653 
-the velocity of, in carbon disulphide 
and the difference in velocity of red 
and blue light in the same, A. A. 
Michelson on, 1884, 654 
--the wave theory of, Dr. H. Hudson 
on, 1870, 39 
* -and heat, waves of, G. J. Stoneyon 
the amplitude of, 1876, 31 
Lightbody (E.) on the sedimentary de¬ 
posits of the River Onny, 1870, 11 
--(Dr. W. H.) on the vascular arrange¬ 
ments of the cornea, 1865, 10 S 
Lighthouse on the Holywood Bank in 
Belfast Lough, eclipsing-apparatus con¬ 
structed for the, W. Bottomley on the, 
1874, 220 
■- illumination, a new method of 
burning oil for, J. E. Wigham on, 1886, 
S 09 
_—— system of Canada, W. Smith on the, 
1884, 891 
^Lighthouses, distinctive characters to. 
Sir W. Thomson and J. Hopkinson on 
methods of giving, 1875, 253 
-electric illumination of, Dr. J. Hop¬ 
kinson on, 1886, 811 
* -ex-focal light, J. E. "Wigham on the 
advantages of, in first order dioptric, 
1881, 776 
- gas for, J. E. Wigham on a new 
application of, 1878, 436 
-illuminant for, J. E. Wigham on a 
new, 1886, 809 
--lenses used for revolving lights at, 
J. E. Wigham on a new method of 
arranging the annular, 1886, 809 
-light for, J. E. Wigham on a new 
form of, 1886, 809 
-paraboloidal reflector for, T. Steven¬ 
son on a, 1871, 37 
-revolving, J. Hopkinson on improve¬ 
ments in the clockwork of, 1875, 248 
Lighting, a question in the theory of, 
Lord Eayleigh on. 1881. 526 
Lightning, dark flashes of. A. W. Clayden 
on, 1889, 507 
--figures, Charles Tomlinson on, 1861. 
48 
——- haystack struck by, note by Sir D. 
Brewster on a, 1867. 19 
- photographs of, Prof. L. Weber od, 
1889, 507 
--protection of buildings from. Prof. 
J. Clerk Maxwell on the, 1876, 43 
Lightning, protection of life and property 
from, W. McGregor on the, 1886, 556 
-action of, on telegraphs, S. A. Yarley 
on the mode of, and on a new method 
of constructing telegraph coils, 1870. 28 - 
-protectors for telegraphic apparatus,. 
W. H. Preece on, 1879, 259 
Lightning-conductor, a new form of, 
which can be easily tested, S. Vyle on,. 
1881, 780 
-conductors, the construction of, Prof. 
Zenger on symmetric conductors and, 
1873, 41 
*-E. Anderson on, 1878, 457 
-the necessity for a regular inspection 
of, E. Anderson on, 1880, 471 
-—— the proper form of, W. H. Preece- 
on, 1880, 470 
- discussion on, 1888, 591 
Lights at sea, Sir W. Thomson on the- 
identification of, 1872, 251 
Lignites, New Zealand, Dr. Murray 
Thomson on the composition of some, 
1863, 56 
Lilleshall, Salop, C. J. Woodward on a 
deposit near, containing recent marine 
shells, 1865, 79 “ 
*Lily disease, Prof. [H. M. Ward on a. 
1888, 702 
Limb-plexuses, the morphology and phy¬ 
siology of the, Dr. A. M. Paterson on r 
1887, 775 
Limbs in the higher vertebrata, the modi¬ 
fications in the, and the correspondence 
between the anterior and posterior ex¬ 
tremity, Prof. W. H. Flower on, 1870, 
137 
-Prof. Humphry on the comparison 
of the shoulder bones and muscles 
with the hip bones and muscles, 1870, 
140 
—— in mammalia, comparison of the 
thoracic and pelvic, by E. Garner, 1870, 
137 
- functional equivalency of certain 
parts of, Prof. E. J. Anderson on the, 
1889, 642 
-and lower jaw, Prof. Cleland on the 
interpretation of the, 1869, 119 
Lime, Dr. John Davy on the action of. on 
animal and vegetable substances, 1861. 
165 
-Dr. John Davy on the slacking of 
quick, 1863. 43 
-carbonate, the secretion by animals 
of, E. Irvine and G. S. Woodhead on. 
1389, 637 
-- the solubility of carbonate of. in 
fresh and sea water, W. S. Anderson 
on, 1889. 637 
- silicate of, action of the alkalies on r 
A. Gages on the, 1863, 205 
Limestone, the action of a lichen on. 
Prof. W. J. Sollas on, 1880, 586 
