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Hisham Matar, Agnès Desarthe
La terre qui les sépare
Folio (11 octobre 2018)
Reference : lc_75825
Livre à l'état de neuf, très frais sans annotations ni défauts dissmulés.
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M. Alexandre Bachmann
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1205 Genève
Switzerland
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2 book(s) with the same title
La terre qui les sépare.
Broché sous jaquette, 20X14 cm, 2016, 323 pages, collection du monde entier, éditions Gallimard. Très bon état.
Experiences qui concernant la Régéneration de L'Alun de sa propre Terre, l'apres avoir séparé par L'Acide vitriolique, avec quelques Compositions artificielle de L'Alun par le moyen d'autres Terres, et dudit acide. Traduit de l'Allemand. (+)...
(Berlin, Haude et Spener, 1756). 4to. No wrappers, as issued in ""Memoires de Academie Royale des Sciences et Belles-Lettres"", Annee 1754, tome X, pp. 31-40 a. pp. 41-50 a. pp. 51-68.
First printing of 3 historical chemical papers.""Stahlregarded alum as a compound of vitriolic acid and lime. Marggraf (1754) found that these substances produce only selenite (gypsum), whic is a salt, not an earth. To obtain alum he treated clay with sulphuric acid, but found that crystals were formed only when potash or ammonia was added, so that alum contains these alkalis. The 'earth of alum' (Alaun-Erde) is a peculiar one, present in combination with silica in clay. It is precipitated by alcali from Alum solution and, after drying in air, is soluble in acids, and is hence an 'alkaline earth'...""(Partington II, p. 727).
