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.
World's Largest Catsup Bottle. Collinsville, IL. The main attraction at the World's Largest Catsup Bottle Festival, this 65yr-old, 70ft tall water tower is now a regional landmark, and is even listed on the National Register of Historic Places.