Catalogue of apparatus, to illustrate magnetism, galvanism, electrodynamics, electromagnetism, magno-electricity . Fig. Fig. 72. Revolving Galvanometer Needle. Price $6. to Fig. 108. Heliacal Ring and Semicircles, (ball and rocket joints.) Price $ Fig. 84.

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Keywords: ., bookautho, bookcentury1800, bookdecade1850, bookpublisherbostonsn