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The letter was about discussion on Schwarzehildd calculation for gravitational field round a small particle.

This is a letter from S. R. U. Savoor Deputy Director Madras Observatory to the Director General of Observatories Simla informing that there is no connection in practice between humidity of air and rate of Riefler clock as indicated by graphs.

This fond contains materials related to John Evershed that contains general local office materials including letters of all local government and administrations, proceedings, reports to the government of India etc., A large portion of the collection series contains information on observations from various scientists.