Denny David Denny 
Lost Science of Sound [EPUB ebook] 
Technology of the Ancient Worlds

David Denny has compiled and edited a selection of the best articles providing evidence of the use of acoutic engineering and science in the ancient worlds. From Tibet to the Mayans, from Eygpt to Scotland, ancients used sound technology for healing, building, levitation works and even altering consciouness. Dip in and out of the collection and follow links to the vast array of information out there …