Catalogue of apparatus, to illustrate magnetism, galvanism, electrodynamics, electromagnetism, magno-electricity . Fig. 183. Compound Magnet and Electrotome. Price $8. to daviss catalogue Fig: Fig. 182. Double Helix and Vibrating Electro-tome, (with battery and handles.) Price $10. to Fig. H.

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Keywords: ., bookautho, bookcentury1800, bookdecade1850, bookpublisherbostonsn