| Illustrations in the print include: Fig. 1. Rev. W. Pearson's large machine (Orrery) for Jupiter's sattelites, 2. Wheelwork, 3. Reduced cover of the box. Large Satellite-Machine, by the Rev. W. Pearson.-When we described the new orrery for equated motions in three parts, by the Rev. W. Pearson, under our article ORRERY, we referred the reader for the description of the third portion, which constitutes an accurate and complete satellite machine by itself, to our present title; which, therefore, we now proceed to describe, after having detailed the particulars of those contrivances that preceded it. In this machine the motions of the earth, of Jupiter, and of his four satellites, are all given with a degree of exactitude that is surprising, and that leaves nothing further to be wished for in the mechanical representation of the Jovian system, as viewed from the earth in motion. A lateral view of the external aspect of this machine is exhibited in fig. 1. of Plate XIII. of Planetary Machines, but without the feet by which it is supported, in order to save room in the print. Print Specifics:
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