The Mirror of Literature, Amusement, and Instruction - Volume 14, No. 400, November 21, 1829 by Various
page 30 of 52 (57%)
page 30 of 52 (57%)
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not press them: a few of them, however, may be noticed still further.
Of these, the _Bowls_ appear to be the most attractive. One on the first piece, _by fire_ was a little glass bowl filled with clear water. This bowl was about three inches diameter, placed in the middle of another sphere, about six inches diameter, consisting of several iron rings or circles, representing the hour circles in the heavens. The hour was known by applying the hand to these circles when the sun shone, when that circle where you felt the hand burnt by the sunbeams passing through the bowl filled with water, showed the true hour, according to the verse beneath it: Cratem tange, manusq horam tibi reddet adusta. The phenomenon is thus explained by the Professor: "the parallel rays of the sun passing through the little bowl, are bent by the density of the water, into a cone or pyramid, whose vertex reaches a little beyond those hour circles, and there burns the hand applied; for so many rays being all united into a point, must needs make an intense heat, which heat is so powerful in the summer-time, that it will fire a piece of wood applied to it." To many of the Dials were suitable inscriptions as above, and these with the references must have made the construction of the whole a task of immense labour. It would be absurd to expect that Charles II. had much to do with its completion, for he was, in his own estimation, more pleasantly employed than in watching the flight of time by heavenly luminaries. His attractions were on earth, where the splendour of |
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