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Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Comparison of solid magnet with one Of square iron wire, 6. Comparison Of magnets Of round bar iron with hollow cylindrical magnet, 7. - Characteristics Of magnets for lifting and for attracting from a distance, 8. - Advantages Of hollow and solid magnets, 8. Comparison Of square wire magnets with square solid magnets, 9.