The microscope tube carries a spirit level and revolves upon a horizontal disc.
He had a plumb bob in his hand and a spirit level, but he laid them down.
If a court is level it can't be any leveller, and to be right it must be done with a straight edge and a spirit level.
If it were not for this principle of capillary attraction, it would be difficult to form a bubble of air in a spirit level.
With chain and spirit level the route was carefully surveyed from Lynchburg to the Ohio.
To be used for surveying, a camera must be fitted with a spirit level and some arrangement for cross hairs.
At Metis the height of the cistern of the standard barometer was determined by a spirit level.
A spirit level is the best solution of the first problem, and indicated center points of the second.
Upon inquiry I found they had passed the morning making ice with our ice machine and taking the horizon with a spirit level!
Through a mastered body, and a disciplined mind, up to the spirit level is the full swing.