When was the lightning rod invented?
This Site Might Help You. RE: What is the thinnest material to use for my glasses' lenses? I have a very strong glasses Rx: -8 sphere, -1.25 cylinder. Rather than spend 6-7 times as much money, I bought some glasses from an online retailer (rhymes with penny optimal, you might know who I mean) and used polycarbonate material to try and keep the weight down, but they're still VERY
According to my Perry's reference there are pipe thread standards up to 24 inch but you typically only see threaded piping in sizes of about 3 inch and below.
