Editing Hygroscopy (section)

==History==
Early hygroscopy literature began circa 1880.<ref>{{cite book |editor1-last=Parker |editor1-first=Phillip M. |title=Hygroscopic: Webster's Timeline History, 1880 - 2007 |date=May 17, 2010 |publisher=ICON Group International, Inc.}}</ref> Studies by Victor Jodin (''Annales Agronomiques'', October 1897) focused on the biological properties of hygroscopicity.<ref name="Guppy">{{cite book |last1=Guppy |first1=Henry B. |title=Studies in Seeds and Fruits |date=1912 |publisher=Williams and Norgate |location=London, England |pages=147–150 |url=http://ia804700.us.archive.org/18/items/studiesinseedsfr00guppuoft/studiesinseedsfr00guppuoft.pdf |access-date=5 February 2023}}</ref>  He noted pea seeds,  both living and dead (without germinative capacity), responded similarly to atmospheric humidity, their weight increasing or decreasing in relation to hygrometric variation.

[[Marcellin Berthelot]] viewed hygroscopicity from the physical side, a physico-chemical process.  Berthelot's principle of reversibility, briefly- that water dried from plant tissue could be restored hygroscopically, was published in "Recherches sur la desiccation des plantes et des tissues végétaux; conditions d'équilibre et de réversibilité," (''Annales de Chimie et de Physique'', April 1903).<ref name="Guppy" />

[[Léo Errera]] viewed hygroscopicity from perspectives of the physicist and the chemist.<ref name="Guppy" />  His memoir "Sur l'Hygroscopicité comme cause de l'action physiologique à  distance" (''Recueil de l'lnstitut Botanique Léo Errera, Université de Bruxelles'', tome vi., 1906) provided a hygroscopy definition that remains valid to this day. Hygroscopy is "exhibited in the most comprehensive sense, as displayed

{{ordered list|type=lower-alpha
| in the condensation of the water-vapour of the air on the cold surface of a glass;
| in the capillarity of hair, wool, cotton, wood shavings, etc.;
| in the imbibition of water from the air by gelatine;
| in the deliquescence of common salt;
| in the absorption of water from the air by concentrated sulphuric acid;
| in the behaviour of quicklime".<ref name="Guppy" />}}