INDEX. 
,587 
Page 
Chameleon, Mr J. Murray's experiments and observations 
on its temperature, as connected with the changes of 
its colour, - - - - - -578 
Chardinia, generic characters of, - - - 540 
Chronometers, table of the daily differences, and rates of 
three, on a voyage from Rio de Janeiro to the coast of 
Peru, - - - - - - 194 
Cochlea of the ear of birds, Dr Treviranus's communica- 
tion on the, - - „ - . 572 
Cockle, common, Mr Witham's notice regarding its occur- 
rence in fresh water ditches in Yorkshire, - - 577 
Coco-nut tree, Mr Marshall's contribution to its natural 
and economical history, 107 — Its description, 107 — ■ 
Supposed medical uses, 110 — Habitat and distribution, 
112 — Synonyms, 115 — Uses, II6 — Mode of extracting 
toddy from the flower, 122 — Distillation of arrack from 
the juice, 126 — Extraction of sugar, 128 — Manufacture 
of coir, 1 34— Coco-oil, - - - - 138 
Coldstream, Mr John, his thermometrical observations 
made hourly at Leith, during twenty-four successive 
hours, and once every month, from July J 822 to July 
1823, - - - - - - 175 
Colours, Rev- L. Guilding's table of, - - - 577 
Conchiferous animals observed in Harris, - - 579 
Coregonus albus, described, - - - - 510 
— — Artedi, described, - - - - 515 
Corfu, Mr Miller's register of the weather at, during part 
of 18:^1, - - - - - 90 
Cork, Rev. D. Guilding's notice of a substitute for it, - 570 
Crocodile, Rev. G. Young's account of one found in secon- 
dary rocks at Whitby, - - - 574 
Crystals, Mr Haidinger's account of the method of draw- 
ing them in true perspective, 485 — Excellence of 
Haiiy's figures, 486 — The method developed is that 
followed by Mohs, 486— General principles, 487 — Pro- 
jections of simple forms, 488 — Method of drawing a 
hexahedron, 488 — A regular octahedron, 49 1 — A given 
