Science, pure [20]
——, encouragement of by Government [20]
——, so-called official [21]
Scott, Léon, his phonautograph [53]
Spheres, communication between the various [108]
Stevin, Dutch savant, referred to [2]
Suffrage, universal [111]
Telescopes of the twenty-first century [76]
Telegraphy, forerunners of [17]
Telephon [51]