Editorial | Published:

THE TRANSIT OF VENUS PHOTOGRAPHS 1

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    Abstract

    THE photographs which have been measured were taken with the five photoheliographs made by Mr. Dallmeyer for the Transit of Venus expeditions, on “patent plates” 6 inches square, the images of the sun being very nearly 3.9 inches in diameter. The dry process of Capt. Abney was used throughout.

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