ntal Philosophy, by Joseph Priestley, lecture
IV., pp. 18, ig. J. Johnson, London, 1794.

(6) Translated from Scheele's Om Brunsten, eller Magnesia, och dess
Egenakaper. Stockholm, 1774, and published as Alembic Club Reprints, No.
13, 1897, p. 6.

(7) According to some writers this was discovered by Berzelius.

(8) Histoire de la Chimie, par Ferdinand Hoefer. Paris, 1869, Vol. CL,
p. 289.

(9) Elements of Chemistry, by Anton Laurent Lavoisier, translated by
Robert Kerr, p. 8. London and Edinburgh, 1790.

(10) Ibid., pp. 414-416.

CHAPTER III. CHEMISTRY SINCE THE TIME OF DALTON

(1) Sir Humphry Davy, in Phil. Trans., Vol. VIII.

CHAPTER IV. ANATOMY AND PHYSIOLOGY IN THE EIGHTEENTH CENTURY

(1) Baas, History of Medicine, p. 692.

(2) Based on Thomas H. Huxley's Presidential Address to the British
Association for the Advancement of Science, 1870.

(3) Essays on Digestion, by James Carson. London, 1834, p. 6.

(4) Ibid., p. 7.

(5) John Hunter, On the Digestion of the Stomach after Death, first
edition, pp. 183-188.

(6) Erasmus Darwin, The Botanic Garden, pp. 448-453. London, 1799.

CHAPTER V. ANATOMY AND PHYSIOLOGY IN THE NINETEENTH CENTURY

(1) Baron de Cuvier's Theory of the Earth. New York, 1818, p. 123.

(2) On the Organs and Mode of Fecundation of Orchidex and Asclepiadea,
by Robert Brown, Esq., in Miscellaneous Botanical Works. London, 1866,
Vol. I., pp. 511-514.

(3) Justin Liebig, Animal Chemistry. London, 1843, p. 17f.

CHAPTER VI. THEORIES OF ORGANIC EVOLUTION

(1) "Essay on the Metamorphoses of Plants," by Goethe, translated
for the present work from Grundriss einer Geschichte der
Naturwissenschaften, by Friederich Dannemann (2 vols.). Leipzig, 1896,
Vol. I., p. 194.

(2) The Temple of Nature, or The Origin of Society, by Erasmus Darwin,
edition published in 1807, p. 35.

(3) Baron de Cuvier, Theory of the Earth. New York, 1818, p.74. (This
was the introduction to Cuvier's great work.)

(4) Robert Chambers, Explanations: a sequel to Vestiges of Creation.
London, Churchill, 1845, pp. 148-153.

CHAPTER VII. EIGHTEENTH-CENTURY MEDICINE

(1) Condensed from Dr. Boerhaave's Academical Lectures on the Theory of
Physic. London, 1751, pp. 77, 78. Boerhaave's lectures were published as
Aphorismi de cognoscendis et curandis Morbis, Leyden, 1709. On this
book Van Swieten wrote commentaries filling five volum