A Primer for Sampling Solids, Liquids, and Gases: Based on the Seven Sampling Errors of Pierre Gy

How does a marble manufacturer know that the colour will be consistent throughout the products he is making? How can you tell if the liquid at the bottom of a container is the same consistency as that at the top? How does a pellet manufacturer know if the pellets are consistently the same size? How does a chemical manufacturer know if the percent purity in a sample is representative of the whole batch? This primer on sampling solids, liquids and gases answers these, and similar questions.