MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 337
The first user who solved this task is Erkain Mahajanian.
#brainteasers #math #riddles
Fox Talbot photographic processIn 1839, Henry Fox Talbot read a paper before the Royal Society, London, to describe his photographic process using solar light, with an exposure time of about 20 minutes: Some Account of the Art of Photogenic Drawing or the Process by which Natural Objects may be made to Delineate Themselves without the Aid of the Artist's Pencil. He had heard that Daguerre of Paris was working on a similar process. To establish his own priority, Fox Talbot had exhibited “such specimens of my process as I had with me in town,”the previous week at a meeting of the Royal Institution, before he had this more detailed paper ready to present.« |