Table 3. 

 TABLES FOR CONVERTING U. S. WEIGHTS AND MEASURES.* 



(1) CUSTOMARY TO METRIC. 



Accordinjj to an executive order dated April 15, 1893, the United States yard is defined as 3600/3937 meter, and 

 the avoirdupois pound as 1/2.20462 kilogram. 



1 meter (international prototype) = i5i;3i64.i3 times the wave-length of the red Cd. line. Benoit, Fabry and 

 Perot. C. R. 144, iqo7 differs only in the decimal portion from tlie measure of Michelson and Benoit t4 years earlier. 



The length of the nautical mile given above and adopted by the U. S. C'oast and Geodetic Survey many years aeo, 

 is defined as that of a minute of arc of a great circle of a sphere whose surface equals that of the earth (Clarke's Sphe- 

 roid of 1866). 



* Quoted from sheets issued by the United States Bureau of Standards. 



Bmithgonian Tables. 



