Författare: Percy Verance

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. The author has …

In 1861, Henry Dircks, a civil engineer, of London, published a work entitled ’Perpetuum Mobile; or, Search for Self-Motive Power, During the Seventeenth, Eighteenth and Nineteenth Centuries.’ The bo …