Dudley Observatory, American Astronomical Society, American Institute of Physics · New York [etc.] American Institute of Physics [etc.] · leaf 358
consecutive culminations ofthe star is larger than at any othertime, amounting sometimes to morethan 50° Fahrenheit, as shown bymy note-book. No doubt can beentertained that the variation in theazimuth is caused by the heat of thesun, if we take into account theparticular situation of the… … bling somewhat the adjoined figure, which will also show thedirection of the meridian. The hill itself consists of porphyryformed in columns of a blackish color, which gives it a verystrong resemblance to the Hessian basalts. The Observatoryis placed on the northern side of the hill (see point O),…
Astronomy
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