I was contemplating Mr. Taylor's tank problem and calculated what wedge angle on a conventional 1" x 2" stunt tank would give you 1 oz./ inch. I figure it's 104 degrees, assuming infinitesimally thick tank walls. Being ever-so-helpful, I recommended a Veco T-21H.
Now for the quiz: How does this lady write backwards on the glass so easily, and why would a man come up with the answer faster than a woman?
Clarification: The answer to why she writes backwards so easily, not the answer to the math.