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 first glass baby bottle in the U.S. was patented by Charles Windship of Roxbury, Massachusetts in 1841. His design featured a teardrop-shaped bottle with a glass tube coming down from the neck to act as a straw. Attached to the neck was a rubber hose, leading up to a bone mouth guard and a rubber nipple.