49.9 MB (2.6 MB compressed)
3994 x 4363 pixels
33.8 x 36.8 cm ⏐ 13.3 x 14.5 in (300dpi)
GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Electric fan, coloured X-ray. This consists of a base stand, in which simple electrical wiring and circuitry is seen, and a fan enclosed in a grille. Three switches (lower right) control the speed of the fan, which is powered by electricity. The fan has a cooling effect by moving air around a room. This can carry excess heat away from a person by increasing evaporation of sweat, though this does not work so well in humid atmospheres.
Model release not required. Property release not required.