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Fig. 2. - Magnetic Bell Telephone, Vintage Engraving.
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Old Bell Magnetic Telephone, Vintage Engraving.
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Fig. 6. Intestine, Peyer's Patches Or Aggregated Lymphoid Nodules, Vintage Engraving.
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Fig. 3. Inside Of An Old Bell Magnetic Telephone , Vintage Engraving.
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Fig. 5. - Communication Via The Telephone Magnetic Bell, Vintage Engraving.
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Fig. 4. - Perspective Of The New Telephone Magnetic Bell, Vintage Engraving.
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Fig 6. Insects Maxillary Palps, Vintage Engraving.
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Fig 2. Selenium Element Used In A Photophone., Vintage Engraving.
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Fig. 6. A. Colorless Cells Of The Mussel. B. Blood Cells Of Slug, Vintage Engraving.
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Fig. 6. Effect Curves Worked In The Mass, Vintage Engraving.
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Fig. 6. A. Colorless Cells Of The Mussel. B. Blood Cells Of Slug, Vintage Engraving.