Microscope Janssen, a spectacle maker first stacked two convex lenses to amplify the magnification. Zachariahs Janssen Netherlands 1590 Microscope Janssen, a spectacle maker first stacked two convex lenses to amplify the magnification. Built on Eyeglasses invented Led to TelescopeRed blood cellsCellsMicroorganismsBacilliCrystallographyStethoscopeSiliconAluminumMammalian ovaBrownian motionThoriumAchromatic microscopesCelluloseBlood typesUltramicroscopeTissue cultureElectron microscope