Raisins are a great food that boost testosterone levels for multiple reasons. Firstly, theyâre anti-inflammatory and chock-full of antioxidants, such as resveratrol, which has been linked to increased testosterone and lowered estrogen levels in few studies (study, study).
In 1839, John Herschel made the first glass negative, but his process was difficult to reproduce. Slovene Janez Puhar invented a process for making photographs on glass in 1841; it was recognized on June 17, 1852 in Paris by the AcadÃ©mie Nationale Agricole, ManufacturiÃ¨re et Commerciale.
History of Electricity-Early Inventors. Otto von Guericke proved that a vacuum could exist. Creating a vacuum was essential for all kinds of further research into electronics. In 1660, Otto von Guericke invented a machine that produced static electricity, this was the first electric generator. In 1729, Stephen Gray discovered the principle of the conduction of electricity. In 1733, Charles Francois du Fay discovered that electricity comes in two forms which he called resinous (-) and vitreous (+), now called negative and positive.