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The report gives full particulars concerning the 6-inch and 9-inch prismatic cameras which were used during the eclipse, and the results obtained. Twenty-four of the photographs are reproduced. A table is given indicating the wave-lengths and probable origins of the 856 lines which have been measured between D and λ 3663.

Total eclipse of the Sun, January 22nd, 1898. Observations at viziadrug.—Part IV. The prismatic cameras