VI TABLE OF CONTENTS. 



PAGE. 



45. Manganese 282 



46. Iron . 287 



47. Nickel and Cobalt 291 



48. Ruthenium 311 



49. Rhodium , 313 



50. Palladium 315 



51. Osmium , 322 



52. Iridium 325 



53. Platinum 327 



54. Cerium 335 



55. Lanthanum.. 344 



56. The Didymiums 351 



57. Scandium 354 



58. Yttrium 355 



59. Samarium, Gadolinium, "Erbium, and Ytterbium . 359 



60. Terbium, Thulium, Holmium, Dysprosium, etc , . 362 



61. Argon and Helium 363 



Table of Atomic Weights 364 



Index . . 3 6 7 



