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The results obtained by Professor Respighi and myself during the eclipse of 1871 in India, in which part of the attack consisted in the employment of slitless spectro­scopes—a method of work at which we had arrived independently—indicated the extreme value of such observations. For my own observations in 1871 I had arranged a train of five prisms without either collimator or observing telescope. “I saw four rings with projections defining the prominences. In brightness, C came first, then F, then G, and last of all 1474k. Further, the rings were nearly all the same thickness, certainly not more than 2' high, and they were all enveloped in a band of continuous spectrum.

XV. The total eclipse of the sun, April 16th, 1893 —Report and discussion of the observations relating to solar physics