I

Indigo, 243 , 284 , 366

Industry and technology, chemical, 2 , 4 , 9 , 20 , 28 , 30 -33, 69 , 114 , 118 , 242 -243, 269 -270, 282 -284, 304 -309, 321 -322, 350 , 353 , 362 , 366 , 392 -393, 439 , 451

Inorganic chemistry, 26 , 48 -52, 59 -62, 87 -88, 95 , 99 , 135 -136, 148 , 153 , 177 , 198 -199, 245 , 269 , 302

Isomerism, 17 , 192 -195, 199 , 204 , 223 -224, 227 -230, 233 , 242 , 249 , 291 -304, 311 -315, 319 , 338 -339, 431