商鞅方升是在秦孝公十八年时商鞅颁发的标准量器,是众所周知的重要文物。它的容积以前会经测定,分别为199.69和201毫升(注一)。由于考虑到测量时方升表面附有厚度不同的锈片和泥土,因此测点不可能密合器表,由此可知以前所测数据的乘积,应该略为小于实际的容量。同时,商鞅方升铭文规定: Shang Yang Fang Sheng is a standard gauge issued by Qin Xiaogong for 18 years and is a well known and important cultural relic. Its volume was previously determined to be 199.69 and 201 ml, respectively (Note 1). Due to the fact that the surface of the ascending surface is covered with rust and dirt with different thicknesses, it is impossible to fit the measuring point at the measuring point. Therefore, the product of the previous measured data should be slightly smaller than the actual capacity. At the same time, Shang Yang Fang Sheng inscription provides: