This document discusses different methods for measuring pressure in fluid flows. It describes how static pressure is measured by drilling small holes perpendicular to the surface to avoid disturbing the flow. Stagnation pressure is measured using an open-ended probe facing the flow. The position and design of pressure probes and sensing holes is important to minimize measurement errors from nose and stem effects. Pressure transducers and liquid manometers are mentioned as devices that can be used to measure pressures.