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I. Experiments on the Motion of the Sap in Trees

Published online by Cambridge University Press:  17 January 2013

John Walker
Affiliation:
Regius Professor of Natural History in theUniversity of Edinburgh.

Extract

The discovery of the circulation of the blood in animals was soon followed by conjectures concerning the existence of a like circulation in the sap of vegetables. These conjectures gave rise to the first improvements in vegetable physiology, which may be dated from the appearance of a set of queries concerning the motion of the juices of plants, published in the Philosophical Transactions, anno 1668. These queries immediately engaged Dr Beale and Dr Tonge, and afterwards Dr Grew, Mr Willoughby, Mr Ray, and Dr Lister, to enter upon the subject; who, in a great variety of observations, struck out the first considerable discoveries in the vegetable œconomy.

Type
Papers Read Before the Society
Copyright
Copyright © Royal Society of Edinburgh 1788

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References

page 5 note * Bonnet sur l'Usage des Feuilles, p. 284.

page 15 note * Vide Plate I. Fig. 1.

page 21 note * Physique des Arbres, tom. i. p. 66.

page 22 note * Philos. Trans. anno 1668. p. 855.

page 22 note † Hales Staticks, vol. i. p. 145.

page 25 note * Salix caprea, Lin.

page 34 note * Physique des Arbres, tom. i. p. 66.

page 34 note † Anatomy of Plants, Lond. 1682. fol.

page 34 note ‡ Bonnet fur l'Usage des Feuilles, p. 65.

page 35 note * Henckel. Flora Saturnizans, cap. 4.

page 36 note * Ludwig Institutiones Regni vegetabilis, Lips. 1757, 8vo. p. 183.

page 37 note * Bonnet, p. 285.

page 37 note † Linnæi Generatio ambigena, Amœn. Acad. vol. 6.

page 38 note * M. du Hamel imagines, that there are in the pith both vaisseaux propres, and lymphatiques.

page 38 note † M. du Hamel thinks, that the pith and the tissu cellulaire are the same substance.

page 38 note ‡ The radiated lines of wood, which extend from the pith to the bark.

page 38 note § Amœn. Acad. vol. 6. p. 325.