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Apropos of the sun, Father Secchi, of the observatory at Rome, has been questioning the great luminary with philosophical apparatus, to ascertain whether any difference could be detected in the heat from different parts of its surface, and the proportion lost in its passage through the atmosphere.
Common, would be of more value to posterity than the collective drawings of this interesting object so carefully made by Rosse, Bond, Secchi, and so many others. Another most important branch of astronomy, that is receiving very great attention at present, is the mapping of the starry heavens; and herein photography will perhaps do its best work for the astronomer.
In the various branches of learning we need mention a few of the greater writers. In astronomy, we find Ricci, Perry, De Vico, Secchi, Curley, Sestini. In mathematics, Hagen, Algué. In archæology, Garucci, Marchi, the master of De Rossi. In Oriental languages, Strassmaier, Harvas, Maas, Van den Gheyn. In theology, Suarez, Vasquez, Toletus, Maldonatus, Franzelin.
Appraisements so outrageously discordant as those of Waterston, Secchi, and Ericsson on the one hand, and those of the French savants on the other, served only to show that all were based upon a vicious principle. Professor F. Rosetti, accordingly, of the Paduan University, at last perceived the necessity for getting out of the groove of "laws" plainly in contradiction with facts.
He called together the Jesuit Fathers who had been dispersed, in the halls of the American and German Colleges. There, although somewhat pinched for room, they continued their international courses, the most extensive that ever were known. The new Rulers, however, it is only proper to observe, never dared to drive Father Secchi from his observatory.
Being asked by some official what the article was, he replied, 'My looking-glass, and in that way passed it off as personal wardrobe, so escaped the duty. "Father Secchi had brought with him, to show me, negatives of the planet Saturn, the rings showing beautifully, although the image was not more than half an inch in size.
Indeed, the companion was not detected until September 16, when Father Secchi at Rome perceived it to have increased its distance from the originating body to a million and a quarter of miles, or about eight times the average interval at the former appearance.
The absolute depth of spot-cavities at least of their sloping sides was determined by Father Secchi through measurement of the "parallax of profundity" that is, of apparent displacements attendant on the sun's rotation, due to depression below the sun's surface.
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