Abstract

Science is as much defined by the local “instrumentarium,” the equipment available to an experimenter at a particular time and place, as by its discoveries and theories. Instruments are devices for detecting and measuring natural phenomena, linked causally to those aspects of nature they are used to record. Some are inorganic, made of glass and metal, while others are organic, the bodies and body parts of living or once living plants and animals. In contrast, pieces of apparatus are quite different in the ways in which they work. They too can be organic or inorganic, but their role is to model things, process, structures, and so on in the natural world. They are used to study natural processes by simulating them in a user-friendly way. Keeping the distinction between instruments and apparatus in mind is crucial to understanding the power of the experimental method