Table 2. 

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



(1) CUSTOMARY TO METRIC. 



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

 the avoirdupois pound as 1/2.20462 kilogramme. 



The only authorized material standard of customary weight is the Troy pound of the Mint. It is of brass of un- 

 known density, and therefore not suitable for a standard of mass. It was derived from the British standard Troy 

 pound of 1758 by direct comparison. 



The British gallon = 4.5459631 litres. 



The British bushel = 16.3477 litres. 



The length of the nautical mile given above and adopted by the U. S. Coast and Geodetic Survey many years ago, 

 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. 

 Smithsonian Tables. 



