Identifying the mystery glass!
I have a 24″ (609.6mm) diameter piece of unknown glass that weighs 72 lbs (32.6 kg) on the nose and is 2″ (50.8 mm) thick exactly. The ROC is 93″…
Astronomy and much more!
I have a 24″ (609.6mm) diameter piece of unknown glass that weighs 72 lbs (32.6 kg) on the nose and is 2″ (50.8 mm) thick exactly. The ROC is 93″…