Catalogue of apparatus, to illustrate magnetism, galvanism, electrodynamics, electromagnetism, magno-electricity . Fig. 175. Magneto-Electric Machine, and Vibrat-ing Electrotome. Price $ Fig. 179. Separable Helices, (with handles.) Price $10. to OF APPARATUS. Fig. 181. 37

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Keywords: ., bookautho, bookcentury1800, bookdecade1850, bookpublisherbostonsn