SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Measuring instruments. From left: a metric screwpitch gauge (0.4-7 millimetres), a device for measuring the thread of a screw; a micrometer screw gauge (0-25mm), a device for measuring very small distances; a 150mm metric rule, a device for measuring flat distances; and vernier callipers (150mm x 0.02mm), a device for measuring internal and external dimensions.
Model release not required. Property release not required.