Principles of Geology. Or, the Modern Changes of the Earth and its Inhabitants Considered as Illustrative of GeologyCharles LyellUitverkocht4,0Volgen
Experiments with Alternate Currents of High Potential and High FrequencyNikola TeslaUitverkocht3,6Volgen
Talks to Teachers on Psychology; and to Students on some of Lifes IdealsWilliam JamesUitverkocht3,7Volgen
A Discourse upon the Origin and the Foundation of the Inequality among MankindJean-Jacques RousseauUitverkocht3,9Volgen
