Searching the mate's room, I found a spirit-level, and laid it on the floor.
A few trials with a spirit-level will cure any man of his conceit on this subject.
Place it lightly in a vice, and in such a position that a spirit-level on top shows the bubble exactly in the centre.
There is a sort of spirit-level in the ear, giving us our sense of balance.
The movement of the bulb was caused by the heat of the finger expanding the top of the spirit-level and causing it to bend.
A carpenter's spirit-level set on an adjustable stand will do as well.
The bar is then levelled by two screws placed near the inner end, and a spirit-level on its upper surface.
If level is important, take it yourself with spirit-level and plumb-line.
Ross R. Rogers began surveying the ditch with a straight-edge and spirit-level.
The spirit-level of absolute honesty is hard to find, and, of course, Tom was no exception.