At the meeting of the Astronomical and Physical Society of 1896 March 3, Mr. George E. Lumsden proposed putting a number of bromide sheets under the tube. Several radiographs were thus taken at once. See TAPST 1896, p.7.
At the meeting of the Astronomical and Physical Society of 1896 March 3, Mr. George E. Lumsden proposed putting a number of bromide sheets under the tube. Several radiographs were thus taken at once. See TAPST 1896, p.7.