The mark consists of a tilted test tube with two drops of fluid falling from the mouth to the left of a tilted flask with four drops of fluid falling from the mouth, both pouring into the funnel-shaped mouth of a stylized tube; the tube descends vertically (the first vertical element), then turns right at a right angle and runs past the flask (the first horizontal element), then turns up at a right angle, running above the flask (the second vertical element), then turns left at a right angle, running past the test tube mouth (the second horizontal element), then runs down and to the left at an angle past the test tube base (the first angled element), then turns down and runs vertically below the first horizontal element (the third vertical element), then turns right at a right angle and runs parallel to the first horizontal element to past the second vertical element, then turns up at a right angle and runs parallel to and past the second vertical element, then turns left at a right angle and runs parallel to the second horizontal element to the point at which the first angled element begins, then turns down and runs parallel to the first angled element, ending at the outer edge of the third vertical element.