Degree Beck

The Beck degree , named after the German chemist Philipp Friedrich Beck , was a unit used in Germany and Switzerland for the relative density of liquids, derived from the 30-part hydrometer designed by Beck in Bern . He relied on the suggestions of the Swiss pharmacist Sigmund Friedrich Benteli (also written Benteley or Bentely), whose assistant he was for a long time; therefore one speaks collectively of the Benteli-Beck hydrometer or the Benteli-Beck degrees.

Conversion of the Benteli-Beck degrees into relative density:

For liquids heavier than water (at 12.5 ° C)

${\displaystyle d={\frac {170}{\left({170}-{\text{°Beck}}\right)}}}$

Lighter than water for liquids (at 12.5 ° C)

${\displaystyle d={\frac {170}{\left({170}+{\text{°Beck}}\right)}}}$

swell

• Gustav Theodor Gerlach : A mutual comparison of the general hydrometer scales with the corresponding specific weights; by Dr. G. Th. Gerlach in Kalk near Deutz. In: Polytechnisches Journal . 176, 1865, pp. 444-461.
• PH List & L. Hörhammer: General part. Active ingredient groups I , Springer-Verlag, Berlin / Heidelberg 1967, p. 41
• Short biography of Philipp Friedrich Beck , accessed on November 15, 2017.