But the fault of the Canadian party consists in not having photograms similar to those of the American astronomers, which all more or less agree with each other. This is extremely hard, and although I congratulate those gentlemen on their well earned reputation, still I trust that our photograms, instead of contradicting one another, will be found consistent. I believe that Jefferson City was the most westerly place where photograms of the eclipse were taken, and directly totality finished with us, it commenced at Des Moines, so that the photograms taken there must be compared with ours. There is a general belief that the protuberances do not change their form, at least but slowly, so it is of great consequence to substantiate my statement, which is, that whilst waiting for No. III. plate this protuberance shot out, and when No. III. photogram was taken it had lost its flamelike appearance, and about one-third its height. No IV. photogram shews the great prominence much reduced in height and increased in breadth, as if it had tumbled into a heap of burning matter. I cannot say whether all prominences are formed by the shooting-out of a flame, and then tumbling into a heap, but I do say that the great protuberance was formed in that manner. In looking at the Des Moines photogram, taken near the end of the eclipse, (I don't mean the engraving,) you see a great heap, not very unlike that seen in No. IV.; and Dr. Curtis remarks "that there is the same appearance of vast volumes of matter tossed up into an irregular heap by the ejecting force, and sinking back again. on all sides in long vertical rolls." This is a very good description of what actually took place. Unfortunately, the long exposure of sixty-six seconds gives a softened appearance, and what should have appeared as a heap of cinders, now looks like a fluid. [Photographs: II, I, IV, III]