198 
Catenicella, observations on the genus, 
118. 
Caterpillars, on a tissue spun by, 123. 
Cell-development, on pathological, 131. 
Celtz, on the evidence of the existence of 
primitive races in Scotland prior to the, 
142. 
Chalk flints and oolitic fossils from the 
boulder clay in Caithness, on, 93. 
Chambers (Robert) on the glacial phe- 
nomena of the neighbourhood of Edin- 
burgh, with some remarks on the gene- 
ral subject, 78. 
Chapman (Prof.) on the isomorphous 
relations of silica and alumina, 50. 
Chat Moss, in Lancashire, on the gra- 
dual subsidence of a portion of the sur- 
face of, by drainage, 101. 
Chemistry, 47. 
Chevallier (Prof.) on a sidereal clock for 
showing the arc of right ascension di- 
rectly, 23. 
Cholera in the Indian armies, on the pre- 
valence and mortality of, 161. 
Chu Ma, grass cloth of India, on the, 112. 
Cirencester, on some chemical facts con- 
nected with the tessellated pavements 
discovered at, 48. 
Clare (Peter) on some extraordinary elec- 
trical appearances observed at Man- 
chester on the 16th July, 1850, 31. 
Claudet (M.) on a newinstrument called 
the dynactinometer, for comparing the 
power of object-glasses, and for mea- 
suring the intensity of the photogenic 
light, 12. 
Clay, boulder, on scratched pebbles and 
fossil specimens from the, and on chalk 
flints and oolitic fossils from the, in 
Caithness, 93. 
Cleghorn (Dr. H.) on the grass cloth 
(Chu Ma) of India, 112 ; on the hedge 
plants of India, and the conditions 
which adapt them for special purposes 
and particular localities, 113. 
Climate of the valley of the Nile, on the, 
45., 
Climates, on the six, of France, 46; on 
a mode of cooling the air of tropical, 
188. 
Clock, sidereal, for showing the arc of 
right ascension directly, 23. 
Cloth of India, on the grass, 112. 
Clouds at Makerstoun, on the daily for- 
mation of, 36. 
‘Coal-field in Lanarkshire, on the Les- 
mahagow and Douglas, 77. 
Coal formation, on the chemical compo- 
sition of the rocks of the, 63. 
Codeine, on a compound of, 48. 
INDEX 1, 
Coldstream (Dr. John) on the expedi- 
ency of ascertaining the extent to which 
infantile idiocy prevails in the United 
Kingdom generally, and of inquiring 
into the causes of its prevalence in cer- 
tain districts, with a view to the adop- 
tion of some means of deliverance from 
it, 128. 
Collimator, on a question of probabilities 
which occurs in the use of a fixed, for 
the verification of the constancy of po- 
sition of an azimuth circle, 1 
Colours, on the influence of sunlight over 
the action of the dry gases on organic, 
65. 
Conglomerate near N. Berwick, on the 
manner in which trap or igneous rocks 
intrude into the sandstone and, 101. 
Connecticut River, and its tributaries in 
New England, on terraces and ancient 
sea beaches on the, 87. 
Cox (Homersham) on the hyperbolic law 
of elasticity of cast iron, 172. 
Crabs, on the number of broods from one 
female in one season, 117. 
Crane, on a wrought iron tubular, 177. 
Crania, table of measurement of Scottish, 
146. 
Crystals, on the magneto-optical proper- 
ties of, 23. 
Crystalline substances, on the theory of 
magnetic induction in, 23. 
Crustacea, notes on, 115. 
Crustacean tribes, on the change of the 
integumeats of animals in the, 120. 
Cullen (Dr.) on the gold mines of the 
isthmus of Darien, emigration to New 
Granada, and canalization of the isth- 
mus of Darien, 79. 
Dalyell (Sir John Graham, Bart.) on ex- 
uviation, or the change of the integu- 
ments of animals in the crustacean 
tribes, 120. 
Dalziel (Dr. J.) on hysteria, hydropho- 
bia, and other convulsive affections, 
embracing an analysis of the pheno- 
mena of water-dread, 129. 
Darien, isthmus of, on the gold mines of 
the, and on the canalization of the, 79. 
Davy (Dr.) on the incrustation which 
forms in the boilers of steam-engines, 
51. 
Declination, on a method for computing 
magnetic charts of, 3. 
Dennistoun (James) on a tissue spun by 
caterpillars, 123. 
Diamond, on a peculiar form produced 
in a, when under the influence of the 
voltaic arc, 53. 
