Common Force Measure (Year of 1757)
1 poundal (pdl.) = unit of force that gives a mass of 1 av.lb. acceleration of 1 ft./sec./sec.
1 pdl. = 0.0310809 av.lb.
1 pdl. = 0.138255 newton (N)
1 pdl. = 0.0140981 kilgravre force
1 pdl. = 13825.5 dyne
1 pound force (lbf.) = 32.17405 pdl.
1 lbf. = 4.44822 newton (N)
1 lbf. = 0.453592 kilogravre-force
1 lbf. = 444823 dyne
1 slug or geepound = unit of mass acquiring acceleration of 1 ft./sec./sec. by a force of 1 av.lb.
1 slug = 32.17405 av.lb.
     
LEATHER SEALER'S OFFICE, Londonderry, Vt. April 8th 1826 Rory Ely Cole
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