- 1641 in science
The year 1641 in
science andtechnology involved some significant events.Technology
* The sealed
thermometer is developed withFerdinand II, Grand Duke of Tuscany , using a glass tube containingalcohol , which freezes well below the freezing point of water.Births
*
Nehemiah Grew , English botanist and physician who made some of the early microscopical observations of plants (died 1712)
*Regnier de Graaf , Dutch physician and anatomist who discovered the ovarian follicles, which were later named Graafian follicles (died 1673)Deaths
*
January 3 -Jeremiah Horrocks , English astronomer (born c1617 )
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