Botany.- Hales (Stephen) Vegetable Staticks: Or, An Account of some

Botany.- Hales (Stephen) Vegetable Staticks: Or, An Account of some Statical Experiments on the Sap in Vegetables, first edition, 19 engraved plates, very slight marginal worming at end, the odd ink correction to text, manuscript f. titled 'Vegitatio Hahosiana' dated 1733 bound in after title, [ESTC T81048; Henrey 777], for W. and J.Innys, and T.Woodward, 1727; Statical Essays containing Vegetable Staticks, 2 vol., vol.1 second edition, vol.2 first edition, 19 engraved plates, vol.1 lightly browned, Ragley Hall Library bookplates, for W. and J.Innys and R.Manby, and T.Woodward, [ESTC T69058 & T146739; Henrey 778], 1731-33, non-uniform contemporary panelled calf, rebacked, morocco labels to spines, bit worn, 8vo (3) *** "The first complete account of the physiology of plants, including the reaction with air and movement of the sap" Horblit 45a for the first volume, and "Important studies on blood pressure" Horblit 45b for the second volume. "In his investigations of plant physiology, described in 'Vegetable statics', Hales studied the movement of water in plants, determining three factors of water movement - root suction root pressure and leaf suction - and established that plants lose water constantly via transpiration through leaves… He also established that plants do not have a true circulation, and developed techniques to measure the varying rates of growth in different plant structures. 'Haemastaticks', the second volume of 'Statical essays', record Hales's pioneering measurement of blood pressure using the manometer, which made it possible to calculate the work of the heart and estimate the magnitude of peripheral resistance. Hales was also the first physiologist to suggest that electricity plays a role in neuromuscular phenomena." (Norman 970).

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