Statical Essays, Containing Vegetable Staticks, or an account of some statical experiments on the sap in vegetables : being an essay towards a natural history of vegetation

Edité par W. Innys & R. Manby, At the West-End of St Paul's, London, 1738

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Third edition, with amendments. Small octavo, pp xiv, 376, illustrated with 19 engraved plates, fore-edge a little thumbed but otherwise very clean and crisp internally, marbled endpapers, contemporary full polished calf, a thin decorated gilt line around the borders, a little marked and worn, the spine gilt decorated with raised bands, lacking the top 25mm of the spine, and lacking small portions at the top of each joint, the joints cracking slightly. still an attractive copy. [In Vegetable Staticks, Hales studied transpiration - the loss of water from the leaves of plants. He estimated the surface area of the leaves of the plant and the length and surface area of the roots. This allowed Hales to compare the calculated influx of water into the plant with the amount of water leaving the plant by transpiration through the leaves. He also measured 'the force of the sap' or root pressure. Hales commented that "plants very probably draw through their leaves some part of their nourishment from the air". He prefigured the cohesion theory of water movement in plants, although his ideas were not understood at the time, so he did not influence the debate on water transport in plants in the 19th century. He also speculated that plants might use light as a source of energy for growth (i.e. photosynthesis), based on Isaac Newton’s suggestion that "gross bodies and light" might be interconvertible. He also describes experiments that showed that "air freely enters plants, not only with the principal fund of nourishment by the roots, but also thro’ the surface of their trunks and leaves". While Hales’ work on the chemistry of air appears primitive by modern standards, its importance was acknowledged by Antoine Lavoisier, the discoverer of oxygen. Hales’ invention of the pneumatic trough to collect gases over water is also considered a major technical advance. Modified forms of the pneumatic trough were later used by William Brownrigg, Henry Cavendish and Joseph Priestley in their research.] Blanche Henrey 779.…

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Détails bibliographiques

Titre
Statical Essays, Containing Vegetable Staticks, or an account of some statical experiments on the sap in vegetables : being an essay towards a natural history of vegetation
Auteur
Hales, Stephen
Éditeur
W. Innys & R. Manby, At the West-End of St Paul's, London
Année de publication
1738
État de l'article
Good
Reliure
Full-Leather
Catalogues du vendeur
Botany, Early works, History of Science

Mike Park Ltd

London, Royaume-Uni

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ornithology, floras, garden history, flower arranging, forestry, landscape, natural history, botany, gardening

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