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.
M&M's World and World's Largest Coke Bottle. Las Vegas, Nevada. M&M's World is a gift shop desperately posing as an attraction. There's a small theater with a 3-D animated M&Ms movie, and on the fourth floor there's a replica of the M&M's NASCAR race car, but in-between is nothing but 28,000 square feet of M&M's jackets, mugs, t-shirts, etc.