too familiar to need repeating;
the work of Luigi Galvani (free teen picks 1737-1798)
and of Count Alessandro Volta (1745-1827), two famous Italian
physicists, is less well known, free teen picks but their labors free teen picks contributed much to
the development of physical science, and their memory is perpetuated
whenever the modern electrician refers to a &free teen picks quot;voltaic cell" or when the
tinsmith speaks of "galvanized" iron. In this same period, the first
important advances were made
in free teen picks the construction of balloons, and the
conquest of the air free teen picks was begun. In the eighteenth century, moreover, free teen picks the
foundations of modern chemistry were laid by Joseph Priestley (1733-
1804), Antoine Laurent Lavoisier (1743-1794), and Henry Cavendish
(1731-1810); oxygen was discovered, water was decomposed into its
elements, and the nomenclature free teen picks of modern chemistry had its inception.
In medicine and free teen picks surgery, too, pioneer work was done by John Hunter
(1728-1793), a noted Scotch free teen picks surgeon and anatomist, and by the Swiss
professor Albrecht von Haller ( 1708-1777), the "free teen picks father of modern
physiology"; the facts which eighteenth-century physicians discovered
regarding the circulation free teen picks of the blood made possible more intelligent
and more effective methods of treating disease; free teen picks and just at the close
of free teen picks the free teen picks eighteenth century, Edward Jenner (1749-1823), an English
physician,
demonstrated that the dread disease free teen picks of smallpox could be
prevented by vaccination. Geographical knowledge was vastly extended by
the voyages of scientific explorers, like the English navigator Captain
James Cook [Footnote: The Captain Cook who discovered, or rediscovered,
Australia. See above, P. 340.] (1728-1779) and the French sailor free teen picks Louis
de Bougainville (1739-1811), in the hitherto uncharted free teen picks expanses of the
southern Pacific. Furthermore, since these explorers frequently brought
home specimens of unfamiliar tropical animals and plants, rich material
was provided for zoology and botany, which, thanks to the efforts of
the Frenchman Georges de Buffon (1707-1788)