= Harvey Fletcher
{c}
{title2=1884–1981}
{wiki}
<Harvey Fletcher> worked with <Robert Millikan> on the development of the <oil drop experiment>. His recollection describes replacing rapidly evaporating droplets with <oil> and observing individual charged drops for longer times. The measurement combines motion under <gravity> and <Stokes drag law> with the effect of an applied <electric field>. Estimating the drop's size and comparing its motion before and after charge changes makes small increments of <electric charge> measurable. His account therefore connects the experimental choice of droplet material with the precision of the charge measurement.<My Work with Millikan on the Oil-Drop Experiment by Harvey Fletcher>[Authored recollection, pp. 44–47; editorial sidebar excluded]{ref}
Physics and acoustics.https://archives.lib.byu.edu/agents/people/3946[Independent professional profile]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Harvey_Fletcher.jpg?width=260]
{title=Portrait of <Harvey Fletcher>}
{description=American Institute of Physics (AIP), Emilio Segrè Visual Archives. https://commons.wikimedia.org/wiki/File:Harvey_Fletcher.jpg[Attribution permission: unrestricted reuse, derivatives and commercial use permitted with attribution to American Institute of Physics (AIP)], via Wikimedia Commons.}
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