 the year 1811 in science and technology involved some significant events, listed below. ==astronomy== * march 25 â great comet discovered by honorÃ© flaugergues. ==biology== * johann karl wilhelm illiger publishes prodromus systematis mammalium et avium, an updating of linnean taxonomy and a major influence on the concept of the 'family' in biology. he first defines the infraclass marsupialia. * peter simon pallas begins publication of zoographia rosso-asiatica, sistens omnium animalium in extenso imperio rossico, et adjacentibus maribus observatorum recensionem, domicilia, mores et descriptiones, anatomen atque icones plurimorum in saint petersburg. ==chemistry== * bernard courtois discovers iodine. * joseph louis gay-lussac and louis jacques thÃ©nard publish recherches physico-chimiques, faites sur la pile; sur la prÃ©paration chimique et les propriÃ©tÃ©s du potassium et du sodium; sur la dÃ©composition de l'acide boracique; sur les acides fluorique, muriatique et muriatique oxigÃ©nÃ©; sur l'action chimique de la lumiÃ¨re; sur l'analyse vÃ©gÃ©tale et animale, etc. in paris. * amedeo avogadro proposes avogadro's law, that equal volumes of gases under constant temperature and pressure contain equal number of molecules. ==mathematics== * carl friedrich gauss works with functions of complex number variables. * s. d. poisson publishes traitÃ© de mÃ©canique (vol. 1). ==medicine== * charles bell publishes an idea of a new anatomy of the brain,repr. of an idea of a new anatomy of the brain starting to distinguish between sensory and motor nerves. * abraham colles publishes a treatise on surgical anatomy in dublin. * francis place publishes illustrations and proofs of the principles of population, including an examination of the proposed remedies of mr. malthus, and a reply to the objections of mr. godwin and others in [[
1811_in_science