Template:Selected anniversaries/October 8: Difference between revisions

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||1872: Mary Engle Pennington born ... bacteriological chemist and refrigeration engineer.
||1872: Mary Engle Pennington born ... bacteriological chemist and refrigeration engineer.


||1873: Ejnar Hertzsprung dies ... chemist and astronomer ... together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram.
||1873: Ejnar Hertzsprung dies ... chemist and astronomer ... together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram. Pic.


||1875: Ignazio Porro dies ... inventor of optical instruments. Porro's name is most closely associated with the prism system which he invented around 1850 and which is used in the construction of Porro prism binoculars. He also developed a strip camera in 1853 for mapping, which was one of the earliest such. Pic.  
||1875: Ignazio Porro dies ... inventor of optical instruments. Porro's name is most closely associated with the prism system which he invented around 1850 and which is used in the construction of Porro prism binoculars. He also developed a strip camera in 1853 for mapping, which was one of the earliest such. Pic.  

Revision as of 19:32, 18 June 2019