56 TABLES 29-36.— COMMON UNITS OF MEASUREMENT 



TABLE 29.— SPELLING AND ABBREVIATIONS OF THE COMMON UNITS OF 



WEIGHT AND MEASURE 



The spelling of the metric units is that adopted by the Internationa! Committee on 

 Weights and Measures and given in the law legalizing the metric system in the United 

 States (1866). 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. 



SMITHSONIAN PHYSICAL TABLES 



