Catalogue of apparatus, to illustrate magnetism, galvanism, electrodynamics, electromagnetism, magno-electricity . Fiff. 92. Fig. 90. Y Armature. Price 30 cents. Fig. 92. Rolling Armature, with U Magnet. Price $ 89. Fig. 94, Fig: 99.

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Keywords: ., bookautho, bookcentury1800, bookdecade1850, bookpublisherbostonsn