Catalogue of apparatus, to illustrate magnetism, galvanism, electrodynamics, electromagnetism, magno-electricity . Fig. 112. Flat Spiral. Price (per lb.) 75 cts. to $ Fig. 129. Electro-Magnet, with three poles. Price $ Fig. Fi<* 115. Axial Revolving Bar. D Price $6, to 24 da viss catalogue Fig. 116. Fig. 117.

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Keywords: ., bookautho, bookcentury1800, bookdecade1850, bookpublisherbostonsn