Tesla's hoped to harness the rays of the sun

Tesla's Free Energy Revealed: "'This is the experimental model of the apparatus with which I hope some day to so harness the rays of the sun that heavenly body will operate every machine in our factories, propel every train and carriage in our streets, and do all the cooking in our homes, as well as furnish all the light that man may need by night as well as by day. It will, in short, replace all wood and coal as a producer of motive power and heat and electric lighting

The plan of Nikola Tesla to harness the rays of the sun to do man's bidding is probably the boldest engineering feat that he or anyone else has ever attempted. Though the idea is so great, its principle is so simple that a schoolboy can readily comprehend it."