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国际计量大会(CGPM)自1889年第一次会议起,致力于m,kg的定义使之逐步完善;原器的建立及其复现方法的研究使之有必要的可靠性;组织国际间的比对使各国的单位量能满意地一致。1901年:定义了单位“升”,到1946年定义了光度单位、力学单位,1948年第9届CGPM建立了热力学温标和热量单位使用焦耳。但在此以前,没有考虑建立一个完整的计量单位制。倒是英国科学进展协会(B.A.A.S.)早在1860年左右就提出了CGS制并构成了用于力学和电磁学的单位制,它一直使用
Since the first meeting of CGPM in 1889, CGPM has devoted itself to the definition of m and kg to gradually improve it. The establishment of prototypes and the study of its recurrence methods have made it necessary for the reliability of international organizations. Compared to the amount of units in each country can be satisfied with the same. 1901: The definition of the unit “L”, by 1946 defines the unit of photometry, the unit of mechanics, the 9th CGPM in 1948 established the thermodynamic temperature scale and the unit of joule used for calories. However, before this, did not consider establishing a complete system of units of measurement. It turned out that the British Association for the Advancement of Science (B.A.A.S.) put forward the CGS system as early as around 1860 and formed a system of units for mechanics and electromagnetism, which has been using