This information will help statisticians use sampling techniques for bulk-material samples that are not made up of well-defined units. It tells what to look for in sampling devices and procedures to obtain current samples from bulk materials, gives sampling guidelines that can be applied immediately, and shows how to analyze protocols to uncover sampling problems. There is an introduction to the ideas of Pierre Gy in everyday language, with intuitive explanations, and examples of simple experiments readers can perform to understand principles. For graduate students in courses on sampling, as well as consultants in statistics, environmental science, and industrial and chemical engineering. Smith is a statistician, data analyst, and process improvement specialist