"Germanium, which name you should preserve since you are factually its father, is the element eka-silicon, Es-73, predicted by Mendeleev, the lowest homolog of tin, standing in the first large period between Ga (69.8) and As (79.9)... Eka-siicon is the element which we have awaited with great anticipation, and in any case the immediate study of germanium will be the most definitive experimentum crucis for the periodic system."