2 TABLE 1. 



SPELLING AND ABBREVIATIONS OF THE COMMON UNITS OF WEIGHT AND MEASURE. 



The spelling of the metric units is that adopted by the International Committee on Weights 

 and Measures and given in the law legalizing the metric system in the United States (1866). 

 The period is omitted after the metric abbreviations but not after those of the customary system. 

 The exponents " 2 " and " 3 " are used to signify area and volume respectively in the metric units. 

 The use of the same abbreviation for singular and plural is recommended. It is also suggested 

 that only small letters be used for abbreviations except in the case of A. for acre, where the use 

 of the capital letter is general. The following list is taken from circular 87 of the U. S. Bureau 

 of Standards. 



SMITHSONIAN TABLES. 



