<a href="https://en.wikipedia.org/wiki/Wet-bulb_globe_temperature" class="extiw" title="w:Wet-bulb globe temperature">WBGT</a> meter consisting of three thermometers and a <a href="https://en.wikipedia.org/wiki/slide_rule" class="extiw" title="w:slide rule">slide rule</a> to compute WBGT from their respective temperature values
<a href="//commons.wikimedia.org/wiki/User:Morn" title="User:Morn">Morn</a>
2008-07-29 12:34:54
<span class="int-own-work" lang="en">Own work</span>