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Show New Sun Dial Accurate Although sun dials have been satisfactory satis-factory in a general way for giving the hours, a new one has been invented that tells time to within 30 seconds. Hands are geared to the dial, which has an additional part through which a ray of light passes. The dial is improved im-proved also to correct for different positions of the sun during the different differ-ent seasons, allowing for the equation of time of. the amount of time the sun is ahead of or behind its average position. po-sition. The Inventor is Prof. W. E. Cooke, an astronomer of Sydney, Australia. |