First edition of an early work on endosmosis (the movement of the sap in the stem) by the German silviculturist Heinrich Cotta (1763-1844), with 7 hand-coloured engraved plates of tree branches and bark. Active research on endosmosis was done in Germany by vegetable physiologists between 1804 and 1840. The work opens with a preface, introduction and table of contents, followed by the main text discussing the movement of sap in woody plants and its function. It is "in many respects an instructive work" (Sachs).
Some small restorations in the first three leaves, some minor foxing and a large stain at the head of the first few leaves. Binding slightly rubbed. Overall in good condition. Bradley I, p. 163; Pritzel 4925; Sachs, p. 509.