es. Another very
celebrated work of Boerhaave is his Institutiones et Experimenta
Chemic, Paris, 1724, the germs of this being given as a lecture on his
appointment to the chair of chemistry in the University of Leyden in
1718.

(2) An Inquiry into the Causes and Effects of the Variola Vaccine, etc.,
by Edward Jenner, M.D., F.R.S., etc. London, 1799, pp. 2-7. He wrote
several other papers, most of which were communications to the Royal
Society. His last publication was, On the Influence of Artificial
Eruptions in Certain Diseases (London, 1822), a subject to which he had
given much time and study.

CHAPTER VIII. NINETEENTH-CENTURY MEDICINE

(1) In the introduction to Corvisart's translation of Avenbrugger's
work. Paris, 1808.

(2) Laennec, Traite d'Auscultation Mediate. Paris, 1819. This was
Laennec's chief work, and was soon translated into several different
languages. Before publishing this he had written also, Propositions sur
la doctrine midicale d'Hippocrate, Paris, 1804, and Memoires sur les
vers visiculaires, in the same year.

(3) Researches, Chemical and Philosophical, chiefly concerning Nitrous
Oxide or Dephlogisticated Nitrous Air and its Respiration, by Humphry
Davy. London, 1800, pp. 479-556.

(4) Ibid.

(5) For accounts of the discovery of anaesthesia, see Report of the
Board of Trustees of the Massachusetts General Hospital, Boston, 1888.
Also, The Ether Controversy: Vindication of the Hospital Reports of
1848, by N. L Bowditch, Boston, 1848. An excellent account is given in
Littell's Living Age, for March, 1848, written by R. H. Dana, Jr. There
are also two Congressional Reports on the question of the discovery of
etherization, one for 1848, the other for 11852.

(6) Simpson made public this discovery of the anaesthetic properties
of chloroform in a paper read before the Medico-Chirurgical Society of
Edinburgh, in March, 1847, about three months after he had first seen
a surgical operation performed upon a patient to whom ether had been
administered.

(7) Louis Pasteur, Studies on Fermentation. London, 1870.

(8) Louis Pasteur, in Comptes Rendus des Sciences de L'Academie des
Sciences, vol. XCII., 1881, pp. 429-435.

CHAPTER IX. THE NEW SCIENCE OF EXPERIMENTAL PSYCHOLOGY

(1) Bell's communications were made to the Royal Society, but his
studies and his discoveries in the field of anatomy of the nervous
syste