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Stereoscopic Harmonic Curves
First Paragraph | All professors of physics are fond of harmonic curves. Many even seem to consider it a duty, as far as their circumstances permit, at one time or another to construct a machine and draw some of these ...
The Reform of the Present Calendar Begun
First Paragraph: | Now that the first step has been taken towards reforming the present calendar, it would seem timely to place this long-disputed question in its true light. This step consisted in the fact that the Holy ...
The Frequency of Total Eclipses of the Sun at a Given Place
First Paragraph: | We may put it down as a fact, that whenever an eclipse of the Sun occurs at any place, the astronomer there is sure to be asked, especially by the representatives of the press: “Does an eclipse of the ...