He invented the nephelometer and demonstrated the insidious effect of occluded moisture in gases and solids. From Wordnik.com. [Theodore W. Richards - Biography] Reference
With a view to being able to detect and determine even the minutest; trace of any precipitate suspended in a fluid, Richards, by adopting and adapting an earlier idea, has constructed his well-known nephelometer, which, by the use of reflected light, allows of a reliable quantitative assessment being made of "opalizing" quantities of substance so small that they could be determined gravimetrically only with the utmost difficulty, if indeed at all. From Wordnik.com. [Nobel Prize in Chemistry 1914 - Presentation] Reference
Scientifically accurate measurements of turbidity are performed using a nephelometer. From Wordnik.com. [Featured Articles - Encyclopedia of Earth] Reference
Then suddenly, out of the blue, the nephelometer is spotted returning safely under its own parachute. From Wordnik.com. Reference
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