INDBX> iflf 



Chromium, on the coinpounds of, xii. 171, 172» Oxide of, 172. 



Alloys of, with iron and steel, 173, 174. On various compounds 



of, 317 

 Chronometers, effects of the proximity of masses of iron on the 



rates of, xii. 374, 415. On the chronometers used in the Arctic 



expedition, 402 



influence of magnetism on, xvii. 197, 202, 365 



' effects of the induced magnetism of an iron shelly 



on the rates of, xviii. 84-47. Method of obtaining the rate of 



on ship-board, 168 

 Chronometrical arrangements of the Admiralty, remarks on, xiii. 



211-218 

 Chrysoberyl (Brazilian), analysis of, xvi. 394 

 Churchman (Mr.), hypothesis of, to account for the phenonena 



of terrestrial magnetism, vi. 94, 95 

 Cinchona, substitute for, vii. 103, 194 

 ■ notice of, in its wild state, effects of, viii. 182, 272. 



Adulteration in, exposed, xiii. 151 

 . analysis of, xvi. 279, 282, 285 



Cinchonia, sulphate of, how prepared, xix. 161, 162 



Cinchonine, process for obtaining, xii. 325 



Cincinnati and Miami Country, natural and statistical view of, iii. 

 81. Its first settlement, ihid. Increase of population, 82. 

 Divisions and produce of the country, ibid. Its geological 

 structure, 83. Plan of the town of Cincinnati, 86. Diseases 

 chiefly prevalent in the state, 87. Favourable prospects for its 

 future prosperity, 87 



Cinerary vase found at Athens, xiii. 72 



Cinnabar (native), notice of, viii. 357 



new process for preparing, xv. 161 



Cinnamon stone of Ualsjo, analysis of, xvi. 394 



Cipher proposed by Lord Bacon, x. 89. Observations on it, 

 90; and on that proposed by anonymous writer in Rees'i 

 Cyclopedia, 94. A new one proposed, with remarks, 95 



for secret writing, remarks on, xii. 21. On Mr. Chenevix's 



