We are concerned with him simply as a vegetable physiologist and in that character his fame is imperishable. Of the book which I have been using as my text, namely, _Vegetable Staticks_, Sachs says: "It was the first comprehensive work the world had seen which was devoted to the nutrition of plants and the movement of their sap.... Hales had the art of making plants reveal themselves. By experiments carefully planned and cunningly carried out he forced them to betray the energies hidden in their apparently inactive bodies[58]." These words, spoken by a great physiologist of our day, form a fitting tribute to one who is justly described as the father of physiology. FOOTNOTES: [17] In 1699 Newton was made master of the Mint and appointed Whiston his Deputy in the Lucasian Professorship, an office he finally resigned in 1703 (Brewster's _Life of Newton_, 1831, p. 249). [18] "There, if anywhere, his dear shade must linger," Trevelyan, _Life and Letters of Lord Macaulay_, 1 volume edit. 1881, p. 55. [19] Black's discovery of CO_2, however, was published in 1754, seven years before Hales died, but Priestley's, Cavendish's and Lavoisier's work on O and H was later. [20] 1837, III. p. 389. [21] _Vegetable Staticks_, p. 346. [22] Sachs, _Geschichte_, p. 502. Malpighi held similar views. [23] _Ibid._, p. 499. [24] Quoted by Caröe, in his paper read before the _Cambridge Archaeological Society_ on _King's Hostel_ etc., and "Printed for the Master and Fellows of Trinity Coll." in 1909. [25] He also held the living of Farringdon in Hampshire where he occasionally resided. [26] _Dict. Nat. Biog._ [27] With a certain idleness Pope reduces him to plain Parson Hale, for the sake of a rhyme in the _Epistle of Martha Blount_, 1. 198. [28] The original reads "deigned not," an obvious slip. [29] This he does by means of a network of threads ¼ inch apart. Pfeffer, _Pflanzenphysiologie_, ed. 1, 1. p. 142, recommends the method and gives Hales as his authority. [30] _Pflanzenphysiologie_, 1865 (Fr. Trans. 1868), p. 254. [31] He gives it as 15·8 square inches, the only instance I have come across of his use of decimals. [32] _Arbeiten_, II. p. 182. [33] See Sachs' _Pflanzenphys._ 1865 (Fr. Trans. 1868), p. 257, where the above correction is applied to Hales' work. [34] _Vegetable Staticks_, p. 5. [35] _Vegetable Staticks_, p. 14. [36] _Vegetable Staticks_, p. 41. [37] Janse in _Pringsheinis Jahrb._ XVIII. p. 38. The later literature is given by Dixon in _Progressus Rei Bot._ III., 1909, p. 58. [38] Compare F. von Höhnel, _Bot. Zeitung_, 1879, p. 318. [39] This is also shown by experiment XC, _Vegetable Staticks_, p. 123. [40] The method by which Hales proposed to record the depth of the sea is a variant of this apparatus. [41] _Vegetable Staticks_, p. 92. [42] According to Sachs (_Geschichte_, p. 509) Ray employed this method. [43] Other facts show that the "gapped" branches did not behave quite normally.