1800 - 1918
This sand timer was actually used to read a person pulse. It was produced by Garrculd in London, England.
8.5 x 1.1
All measurements were taken in centimeters. Measurements are listed as “length by width by height” or “height by diameter” unless otherwise noted.
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The Barbara H. Hagan School of Nursing: Historical Collection. (2017). "Pulse Timer - 1" [Photograph]. Retrieved from http://digitalcommons.molloy.edu/nur_hagan/8