56.Who invented Positive Electrons View Answer Report DiscussAnswer: ANDERSON Explanation:Currently no explanation available Improve this answer lets discuss in forum
57.Who invented Phototherapy View Answer Report DiscussAnswer: N.R.FINSEN Explanation:Currently no explanation available Improve this answer lets discuss in forum
58.Who invented Principle for lever (S.P.Gravity) View Answer Report DiscussAnswer: ARCHIMEDES Explanation:Currently no explanation available Improve this answer lets discuss in forum
59.Who invented Photograph View Answer Report DiscussAnswer: DAUGUERRE Explanation:Currently no explanation available Improve this answer lets discuss in forum
60.Who invented Phonographic Shorthand View Answer Report DiscussAnswer: PITMAN Explanation:Currently no explanation available Improve this answer lets discuss in forum
