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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/130/11/12" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Drawing of a ballistic pendulum, by Benjamin Robins</dc:title>
  <dc:description>Perspective drawing of Benjamin Robins' machine for determining the velocity of bullets. 

Projectiles were aimed from various distances at the square plate which was intended to pivot on an axis - the arc length described by the pendulum allowed Robins to calculate the speed of the bullet.   </dc:description>
  <dc:date>1740s</dc:date>
</rdf:Description>