Back as a teenager I used to blow glass and work with chemistry dodads...there was a hobby shop in town that specialized in chem glassware and tubing. I did this until I was pushing a glass tube into a rubber cork for a boiling flask and the tube broke and went into (and out again) my finger leaving a gaping slice. After taping it shut, a week later while delivering sunday newspapers I broke it open again. ....anyway...just a story.
But I DID make some of those pressure sensitive glass "submarines" that equalized at a depth when you pressed on the liquid containers holding the "sub".
I think a so very slightly bent glass tube mounted on a straight beam might be able to be made....without buying the book!
Geeesh... another delay and turn of direction before completing the router project.... :frown:
Yah, a good used machinists level will do!
Bloy |