Nikola Tesla Autograph Letter Signed.

Inventor, electrical engineer, and physicist, Nikola Tesla is perhaps best known for his contributions to the design of the modern alternating current (AC) electricity supply system. A brilliant inventor, Tesla conducted a range of experiments involving mechanical generators, electrical discharge tubes, and early x-ray imaging, in an attempt to develop inventions he could patent and market. He became well known as an inventor and demonstrated his achievements to celebrities and wealthy patrons at his lab, and was noted for his showmanship at public lectures. Throughout the 1890s, Tesla pursued his ideas for wireless lighting and worldwide wireless electric power distribution in his high-voltage, high-frequency power experiments in New York and Colorado Springs. Tesla's inventions had varying degrees of success and, later in life, he earned the reputation of the archetypal 'mad scientist' for his claims that he was in communication with entities on Mars and in the process of developing a variety of implausible inventions.