On Thu, 10 Aug 2017 14:35:38 -0700 (PDT),
wrote:

Everyone is wasting you time sir. Welding glass is a great was to view the eclipse. Do not go below Shade 11. I don't know how the absorption rate increases when stacked. You can buy 4 1/2" by 5 1/4" glass from Air Gas for $3.20. I am have Shade 12 mounted to my binoculars. Everyone else who is poking a hole in a box or black out curtains that is fine. But spend a few pennies and at lease get the paper shade glasses at 7-11 to see the real thing. This is near a once in a lifetime event don't just watch the reflection.

I wonder how many people you'll blind with that suggestion.
Astronomers and medicos say 14 is the shade, not 11.

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I am a Transfinancial--A rich person born in a poor person's body.
Please stop the hate by sending me money to resolve my money
identity disorder. --anon