IMPROVEMENTS IN OR RELATING TO THE MARKING OF GRADUATED VOLUMETRIC MEASURING VESSELS OF GLASSWARE AND LIKE MATERIALS OF THE ONE MARK TYPE

摘要

1,267,688. Liquid level indicators. WOOD BROS. GLASS CO. Ltd. Aug.7, 1970 [Aug. 8, 1969], No.39768/69. Heading G1H. Volumetric vessels such as flasks are provided with a dark area, e.g. of a vitreous enamel, not more than 1 m.m. below the graduation line to permit the meniscus of the measured volume of liquid to be viewed more easily against a white background.