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.
Jungle Island in Miami is home to a liger (a hybrid cross between a male lion and a female tiger) named Hercules, the largest non-obese liger. The liger is recognized by the Guiness Book of World Records as the largest cat on Earth, weighing in at 900 lbs.