Virology in order to immunize others. In 1717 Lady Mary Wortley Montagu observed the practice in Istanbul and attempted to popularize it in Britain, but encountered considerable resistance. In 1796 Edward Jenner developed a much safer method, using cowpox to successfully immunize a young boy against smallpox, and this practice was widely adopted. Vaccinations against other viral diseases followed, including the successful rabies vaccination by Louis Pasteur in 1886. The nature of viruses however was not clear to these researchers. In 1892, the Russian biologist Dmitry Ivanovsky used a Chamberland filter to try to isolate the bacteria that caused tobacco mosaic
Campaigns of 1796 in the French Revolutionary Wars signed the Second Treaty of San Ildefonso with France on 19 August 1796, entering the war against Britain on the side of France in return for concessions in Italy. In response, Britain withdrew from Corsica in order to concentrate the Mediterranean fleet at Gibraltar against the combined threat. This article makes use of the out-of-copyright work "History of the French Revolution" by François Mignet (1824): Campaigns of 1796 in the French Revolutionary Wars The French Revolutionary Wars continued from 1795, with the French in an increasingly strong position as members of the First Coalition made separate peaces. Austria and Great