Standard buffer solutions for pH-meter calibration. pH-meters measure the voltage. developed between two electrodes. immersed in the sample and. compare that value to a calibration. derived from the same electrode. pair and known standards.
Collinsville, Illinois. Built in 1949 in this former catsup company town, the World's Largest Catsup Bottle celebrated its 65th anniversary in 2014. It's the water tower at the old Brooks Catsup Plant and headquarters.
The pummelo, also known as Chinese grapefruit, is considered the ancestor of the white, pink and ruby grapefruit. It's the largest of all citrus fruits, typically weighing 2 to 4 pounds. These ball-size fruits are used in rituals during Chinese New Year and are said to resemble a full moon. When ripe, the pummelo is pale green or yellow.