Historical information
The wood level has been around for over 100 years and this type is called a spirit level. It gets its name from the mineral spirit solution which is inside the level. The level is used to indicate how parallel (level) or perpendicular (plumb) a surface is relative to the earth. The spirit level is placed on the surface, if the surface is level the bubble in the tube will be in the centre between the lines, if the bubble is either side of the lines then the surface has a slope.
Physical description
Paint spots and wear at grooves. Wood, glass bubbles, brass cover over bubble. Round maker's seal missing.