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.
M F Christiansen, who lived at Akron, Ohio, USA, invented the first glass marble-making machine in 1901. It was semi-automatic and looked like a row of small bicycle wheels in a long line. By the 1920âs the Akro Agate Company had fully automatic machines, which were making thousands of uniformed two and three colour marbles every day.