Weighing method - Hyoryouho (English spelling)

Japanese: 秤量法 - ひょうりょうほう（英語表記）weighing method

This refers to a method of measuring mass. The purpose of measuring mass is to find the correspondence between the mass of the International Prototype Kilogram established by the Metre Convention, so the mass of an object is found by directly comparing a weight that corresponds to this prototype with the object on a balance, or by indirectly comparing the weight with the object using a scale calibrated with the weight. Accurate measurements of mass are performed by the former, and there are the following measurement methods. (1) Simplified method Also called the proportional method. This measurement method assumes that the lengths of both arms of the balance are equal, and after balancing both pans of the balance empty, an object is placed on one pan, and a weight is added or removed from the other pan to balance it, and the mass of the weight placed is taken as the mass of the object.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

質量の測定法をいう。質量の測定はメートル条約で決められた国際キログラム原器がもつ質量との対応を求めることにあるので，この原器との対応値をもつ分銅と物体とをてんびんで直接に比較し，あるいは，分銅で校正されたはかりを用いて分銅と物体とを間接に比較して物体の質量を求める。質量の精密測定は前者により行われ，これには次の測定法がある。(1)簡易法　比例法ともいう。てんびんの両腕の長さが等しいことを前提にし，てんびんの両皿を空の状態でつり合わせたのち，一方の皿に物体を載せ，他方の皿に分銅を加減しながら載せてつり合わせ，載せた分銅の質量を物体の質量とする測定法。

出典　株式会社平凡社世界大百科事典第２版について　情報

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