EntityQ898490· pop 8· linked from 34 articles1691 in scienceSign in to saveoverview of natural science-related events during the year of 1691Connectionslist of years in scienceEntitySwedenCountryscienceEntitytechnologyEntityGottfried Wilhelm LeibnizEntityphysicianEntitydifferential equationEntityRobert BoyleEntityEnglish peopleEntityLeidenEntitymechanical engineeringEntityembryoEntityovaryEntityEdmond HalleyEntityblood transfusionEntitychemistEntityhistory of technologyEntityRolle's theoremEntityspermEntityMichel RolleEntityCategories1690s in science1691 in science17th century in science