Koniscope

The koniscope was an instrument invented by John Aitken to test the purity of air as regards dust. It consisted essentially of an air-pump and a test tube with glass ends. At one end of the test tube was a passage communicating with the air-pump, and near the other end a stopcock. The tube being pointed towards the sky or any other source of light
Found on http://www.probertencyclopaedia.com/browse/GK.HTM

Koniscope

A Koniscope (or coniscope) is a scientific instrument to detect and measure content of dust particles in the atmosphere. A koniscope is also called dust counter, or Aitken dust counter, named after John Aitken who invented the first koniscope. The koniscope is made by connecting a pump with a test tube that is walled with moist paper. The tube is
Found on http://en.wikipedia.org/wiki/Koniscope

koniscope

instrument for measuring dust in air
Found on http://phrontistery.info/k.html
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