History of Chemistry, Volume 2 (of 2) From 1850 to 1910
CHAPTER II
THE CHEMICAL ELEMENTS DISCOVERED SINCE 1850 26 Nomenclature and Classification of Elements. Numerical relationships. Modes of discovery. The Spectroscope. Cæsium, rubidium, thallium, indium, gallium, scandium, germanium. The rare earth elements. Industrial applications of rare elements.