I took that from my town.
You need to research Glass to have that option.
Quoted
Field of Research: Science Name: Glass Description: Many useful things can be made out of glass. With magnifying glasses, microscopes and many other devices our scientists can work even better. Of course often things break in a laboratory but with enough crystal glass we can substantially bring forward our research! Allows: Usage of crystal glass in order to accelerate research in the academy. Current research time: 1D 21h 41m 44s (13,440 Research Points)
This post has been edited 1 times, last edit by "Maireen" (Mar 21st 2008, 12:04am)