GENEUAL INDEX. 
101 
•*Cr}ptobranch, Prof. Humphry on the 
caudal and abdominal muscles of the, 
1871, 140 
Crypt ogamia, vascular, Prof. W. C. 
Williamson 011 the classification of the, 
as affected by recent discoveries among 
the fossil plants of the Coal-Measures, 
1871, 131 
^ Cryptogamic flora and invertebrate flora 
of the fresh waters of the British Isles , 
report on the , 1890, 853 
Cryptogams, the classification of, A. W. 
Bennett on, 1880, 599 
-the antherozoids of, A. W. Bennett 
on, 1889, 619 
Crystalline axis of the Malvern Hills, Dr. 
C. Callaway on the geology of the, 
1888, 654 
* -rocks, the origin of, T. S. Hunt on, 
1878, 536 
* -of Donegal, the age of the, Prof. 
W. King on, 1878, 547 
* -schists, Dr. Robert Sim on certain 
quartz-nodules occurring in the, near 
Killin, Perthshire, 1872, 122 
* -form, the cause of, G. J. Stoney on, 
1883, 400 ; *the relation between che¬ 
mical constitution and, G. J. Stoney on, 
464 
* -forms, A. R. Cattcn on the laws of 
symmetry of, 1867, 10 
- . - structure, Charles Brooke on the 
influence of annealing on, 1869, 21 
-structure of iron meteorites, Dr. 0. 
W. Huntington on the, 1886, 599 
Crystallisation of metals by electricity, 
P. Braham on the, 1871, 67 ; 1875, 39 
-Charles Tomlinson on the action of 
nuclei in inducing, 1868, 45 
* -of a double salt, J. Berger Spence 
on the phenomena of the, 1870, 63 
-of salts in colloid solutions, Dr. 
Ord on the, 1872, 79 ; 1879, 418 
- Dr. Nicol on water of, 1886, 578 
*Crystallogeny, some remarks on, by Prof. 
J. P. Cooke, 1881, 595 
Crystallographic study of danburite, some 
results of the, Max Schuster on, 1885, 
1033 
Crystals. Relation entreles phenom^nes 
de la polarisation rotatoire, et les formes 
hemiedres ou hemimorphes des crist- 
•aux a un ou a deux axes optiques, par 
A. Des Cloizeaux, 1862, 19 
* -A. Des Cloizeaux sur les modifica¬ 
tions temporaires et permanentes que 
la chaleur apporte if quelques pro- 
prietes optiques de certains corps cris- 
tallises, 1862, 38 
--A. R. Catton on the connection be¬ 
tween the form and optical properties 
of, 1864, 10 ; 1867, 10 
- II. C. Sorby on the microscopical 
structure of \ 1865, 136 
Crystals of silver, J. H. Gladstone on, 
1871, 71 
-in the testa and pericarp of certain 
plants, Prof. Gulliver on the, 1873, 104 
-the production of, by the action of 
metals in carbon disulphide in sealed 
tubes, P. Braham on, 1881, 589 
-the development of, from trans¬ 
parent glass by the action of solvents 
upon it, W. Thomson on, 1883, 471 
-W. Barlow on atom-grouping in, 
1890, 754 
-—— form of, and the atom composition 
of chemical compounds, a theory of the 
connection between the, by W. Barlow, 
1885, 983 
Ctenacanthus James Thomson on teeth 
and dermal structure associated with, 
1869, 102 
* Ctenodus (Agassiz), the genus, Dr. R. 
II. Traquair on, 1878, 571 
Cube, Charles M. Willich on the parti¬ 
tion of the, 1866, 7 
--and other roots of a given number 
N, M. Collins on new improvements 
in approximating more rapidly than 
usual to square, 1872, 13 
Cubes, C. M. Willich on some models of 
sections of, 1862, 8 
Cubic curve referred to a tetrad of corre¬ 
sponding points, H. M. Jeffery on, 
1877, 28 
——- Eikosi-heptagram, Prof. Sylvester 
on Prof. Wiener’s stereoscopic repre¬ 
sentation of the, 1869, 15 
* -point, ninth, Prof. H. J. Stephen 
Smith on a construction for the, 
1868, 10 
- spherical curves with triple cyclic 
arcs and triple foci, 11. M. Jeffery on, 
1875, 16 
* -surface, Prof. H. J. Stephen Smith 
on a property of the hessian of a, 
1868, 10 
-- surface referred to a pentad of co- 
tangential points, H. M. Jeffery on a, 
1878, 491 
Cubics of the third class with a double 
and a single focus, H. M. Jeffery on 
plane, 1876, 17 
.-- of the third class with three single 
foci, H. M. Jeffery on, 1877, 26 
-with three single foci, H. M. Jeffery 
on plane class-, 1879, 263 
Cuckoo-flower ( Cardamine pratensis), J. 
Price on the, 1870, 122 ; 1878, 572 
*Cull (R.) on the antiquity of the Aryan 
languages, 1861, 193 
Cullen (Dr.) on the Isthmus of Panama 
and inter-oceanic ship canal routes, 
1865, 118 
* -on the Darien Indians, 1865, 119 
‘Culm’ and ‘ kulm,’ Prof. G. A. Lebour 
on, 1879, 352 
