Janssen brothers biography definition
Zacharias janssen death
Zacharias Janssen; also Zacharias Jansen or Sacharias Jansen; 1585 – pre-1632) was a Dutch spectacle-maker who lived most of his life in Middelburg.
Zacharias janssen invention
What Is the Hans and Zacharias Janssen Cell Theory?
When was zacharias janssen born
Through his neighbor Willem Boreel (1591-1668), the mintmaster’s son, Jansen learned how to counterfeit Spanish copper quarters.
Zacharias janssen interesting facts
Zacharias Janssen is generally believed to be the inventor the compound microscope.