Easy -- hold it at the surface that you want to be level. If the bubble in the glass tube stays in the center where the line is, the surface is level. If not, keep adjusting your work until the bubble stays in the middle. When there are 2 glass tubes and the bubble is not in the same place in both what does that mean? You may have to adjust the work in more than one plane, for example front to back and side to side.
Find something that is level or lay it on a wall and mark level. Turn the level end for end and it should read level on the same mark.
Ethanol
Level
This is known as a tiltmeter or inclinometer.
their own, or fingernails. fingernails is on little riddle level 73...
They had carpenters because they needed the carpenters
their own, or fingernails. fingernails is on little riddle level 73...
The Carpenters ended in 1983.
In what direction do seismic waves carry the energy of an earthquake?
At present there are far more male carpenters than female.
No, carpenters would not use tesselations.
Carpenters - album - was created in 1970.