[Sca-cooks] Farsighted lenses

[David Friedman]

Crystal as in glass or crystal as in clear quartz?

On 3/22/14, 3:17 PM, Susan Lord Williams wrote:
> Actually it is perfectly logical that lenses were available from the 8th century in Cordoba when the crystal factory was founded to provide crystal wine glasses to the court thanks to Ziryabs contributions to refined living in Andalusia.

-- 
David Friedman
www.daviddfriedman.com
http://daviddfriedman.blogspot.com/