The meniscus formed by the water in the pipette, must be so adjusted that the horizontal plane passing through the upper edge of the scale mark, is tangential to the lowest point of the meniscus, when viewed in this plane.
the capacity corresponding to any scale mark, is equal to the volume of water at the reference temperature, delivered by the pipette at this temperature when it is emptied as specified in the appendix, point A.3., after filling it to the scale mark