1500s Developments in glass making and the science of optics (the study of rays of light). It was found that by using glass lenses, you could bend rays of light coming from an object. This could ...

Glass can be notoriously difficult to identify. Signatures, if there are any, can be faked, molds can be reused, and glassmakers often imitated one another’s decorations. Stiegel-type glass is an ...

Late 1600s – Dutch scientist Antonie van Leeuwenhoek constructed a microscope with a single spherical lens. It magnified up to ×275. 1800s - the optical quality of lenses increased and the ...