. The Bell System technical journal . Fig. 7- -A pair of prominences taken without optical filter (, in white light)on Oct. 3, 1938. THE CORONA VISER 259. Fig. 8—A jet or flare in the corona photographed on October 18, 1938. ^ ^j> • ^. ^ *^«« •x*^ ^ • leoo 1900 GREENWICH CIVIL TIME 2000 Fig. 9—Positions of the flare of Fig. 8 at the times shown. The turning of theimage is due to the horizontal mounting of the telescope.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1