Sentence:  It was erected by the application of those universal laws and forces of nature which cause iron to float. By the same laws, gravity may be overcome or neutralized, and stone made to float in air. The Pyramid was thus built by <WSD>levitation</WSD>, abetted by song and chanting, much in the same manner in which the Druids of England set up their huge stones at a later period. 
Meaning of the word marked with <WSD> tags:  The suspension of something via technical means without any mechanical support, such as by magnetism