1892 in science

The year 1892 in science and technology involved some significant events, listed below.

Astronomy

September 9 – At Lick Observatory, Edward Emerson Barnard discovers Amalthea, the third moon of Jupiter and the last natural satellite found by direct visual observation.La planète Mars et ses conditions d'habitabilité, by Camille Flammarion, director of the Paris Observatory, argues that the Martian canals are artificial.

Viruses are first described by Russian–Ukrainian biologist Dmitri Ivanovsky.
The microbial agent responsible for influenza is incorrectly identified by R. F. J. Pfeiffer as the bacteria species Haemophilus influenzae.

approx. date – James Dewar invents the Dewar flask.

May 28 – Scottish American naturalist John Muir founds the environmental organization the Sierra Club in San Francisco, aided by a group of professors from the University of California, Berkeley, and Stanford University.
American environmental chemist Ellen Swallow Richards, in a lecture in Boston, calls for the "christening of a new science" – oekology, to embrace environmental education and consumer nutrition.

November – Traveller Isabella Bird becomes the first woman inducted as a Fellow of the Royal Geographical Society in Britain.

Georg Cantor shows there are different kinds of infinity and studies transfinite numbers.
Gino Fano discovers the Fano plane.

July 18 – Russian-born bacteriologist Waldemar Haffkine demonstrates the first anti-cholera vaccine.
German pathologist Curt Schimmelbusch proposes that medical dressings should be sterilized daily prior to surgery and designs a form of autoclave to facilitate this.
Czech neurologist Arnold Pick identifies the clinical syndrome of Pick's disease and the Pick bodies that characterise the frontotemporal lobe disorder.
Johann von Mikulicz-Radecki first describes Sjögren syndrome.
First edition of William Osler's textbook The Principles and Practice of Medicine, designed for the use of practitioners and students of medicine is published in Edinburgh while the author is Professor of Medicine at Johns Hopkins University. It remains internationally significant in medical education for forty years.

Brothers Richard and Cherry Kearton publish With Nature and a Camera in the United Kingdom, the first nature book illustrated entirely from photographs.