Hours of Exercise in the Alps

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VG, 1st US ed, 7 pls, 1871. In the orioginal red printed cloth, corners rubbed. Spine, edges rubbed, gilt titles, edges bumped. Internally, half title, frontis, [5], (vi-x), [2], [1], 2-473 pp, [1], [6] adverts, 7 pls (B&W), ink owners details to verso frontis (CP Patterson 1873), wear to lower cover, small tear at spine head, signs of removed bookplate to fpd. (Folio, 125*194 mm). (Allibone 1457. Neate 839). Tyndall, physicist & mountaineer, who in 1854, after attending the British Association meeting in Liverpool, visited the skate quarries of Penrhyn in north Wales. His familiarity with the effects of pressure upon the structure of crystals led him to give special attention to the problem of slate cleavage. By careful observation and experiments with white wax & many other substances which develop cleavages in planes perpendicular to pressure, he satisfied himself that pressure (uniaxial compression) alon was sufficient to produce the cleavage of slate rocks. See ODNB. N° de ref. del artículo 006170

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