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multiplied and exhibited to us by this comprehensive science; for, here, instead of stopping at the constellations, we must ascend from the sun to the planets; from the planets to the constellations; from the constellations to the milky way, or boundary of the nebula of the earth, or exterior limit of all our known and native constellations;–from the milky way to the foreign nebulae; and from the foreign nebulae to the heavens beyond the nebulae, or beyond all human observation;–and, saying this, he drew, in corresponding order, a series of segments of concentric circles, to stand for these divisions of the heavens, and wrote over each the description that belonged to it:

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* But this term, nebula,” said Mrs. Mowbray, “ is as new to me as that of Sidereal Astronomy?”

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