50.4 MB (50.0 MB compressed)
4813 x 3661 pixels
40.6 x 31.0 cm ⏐ 16.0 x 12.2 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
False colour scanning electron micrograph (SEM) of the movement of an inexpensive watch (made by Timex) showing a close-up of the minute wheel & pinion (bottom) meshing with the hour wheel (top). These comprise part of the motion work of the watch, the train of reduction gears that display the time. A central wheel, connected to the teeth of the barrel (which houses the mainspring) turns once per hour. The no. Magnification: x 8 at 35mm size. Original is bw print h100/164.
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