Catalogue of apparatus, to illustrate magnetism, galvanism, electrodynamics, electromagnetism, magno-electricity . Fio- 76 Thermo-Electric Revolving Frames. b Price $ Fie- 77 Thermo-Electric Arch, between poles of TTS: - Price $ a U-Magnet. 4* 42 DAVISS CATALOGUE OF APPARATUS. Fig. Fig F. Receiving Magnet for the Telegraph.* Price $ Fig. G.

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Keywords: ., bookautho, bookcentury1800, bookdecade1850, bookpublisherbostonsn