INDEX. 109 



persulphate of, and ammonia, 381. Test for the proto-salta 

 of, 3S2. Analysis of the native sulphate of, and alumina, 389 

 Iron, alloys of zinc with, xvi. 383. 



action of sulphur on, xvii. 165. On the development of 

 magnetical properties in, by percussion, 254. Combustion of 

 by sulphur, 381. Ammonia found in the oxides of, ib. On 

 the different masses of, found in the eastern Cordillera of the 

 Andes, 394 



- action of, in motion upon tempered steel, xviii. 160. Scales, 

 nature of, when heated, 387. Oxide of, reduction by cementa- 

 tion, 388 



■ ■ combinations of, with copper, xix. 154. The drawing of iron 

 wire facilitated, 135. On the magnetism imparted to, by rota- 

 tion, 263. Alteration in the magnetism of an iron plate, occa- 

 sioned by a rotation on its axis, 265. Method of browning 

 iron, 329. Effects of the exposure of, to air in high regions, 347 



furnaces, metallic titanium found in, xx. 176 ; hematitic 



ore, recent formation of, 187; stone, phosphate of lime found 

 in, 412 ; tenacity of, as applicable to chain-bridges, 162 



wire, experiments on the tenacity of, xvi. 367 



suspension bridge at Geneva, account of, xvi. 369. Ex- 

 pense of, xvii. 148. 



suspension bridges, remarks on, xvii. 147 



Irritability, summary of Haller*s theory of, xiii. 98. Remarks 

 thereon, 99. Of plants, xvii. 176 



Irritation of the spinal nerves, remarks on, xii. 428 



Ischia, notice of a particular substance formed by the vapour of 

 the thermal waters at, viii. 376 



Island, newjformed in the Bay of Bengal, ix. 197. Off the island 

 of St. Michael, 414 ; and off Cape Horn, 417 



rent asunder, notice of, x. 475 



Italy, remarks on the wines of, xviii. 132 



Ive's (Dr. A. W.) analysis of lupulin, xi. 205 



Ivory (Mr.) on an investigation of the theory of capillary attrac- 

 tion, i. 290 



account of his method of computing the latitude from two 



altitudes, and the time iotervening, xii. 389 



