Steelyard
a balance or weighing machine consisting of a lever with unequal arms. It is of two kinds. The common steelyard, or Roman balance, is formed by suspending the article to be weighed from the end of the shorter arm, or placing it in a scale depending therefrom and sliding a determinate weight along the longer one till an equilibrium is obtained. The longer arm is so graduated that the figure opposite to which the weight rests indicates the weight of the article at the extremity of the shorter arm. The second form is the STEELYARD Danish balance, which differs from the Roman in having the counterpoise fixed at one end and the fulcrum slid along the graduated beam.