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.
Siberian Tiger or Amur Tiger is the largest extant cat species ever exists on earth with the head & body length of 7 ft 4 inch and can weigh up to 310 kg. It is the second tallest cat in felidae family just after the African lion with the shoulder height of 3 ft 3 inch.