Table 1 (continued) 

 CONVERSION FACTORS 



11 



C. Volume: (continued) 



1 gallon, British (Brit, gal.) (Im- 

 perial gallon) 

 (1 British gallon is defined as 

 the volume occupied by 10 pounds 

 of water at 62° F.) 



= 160 Brit. fl. oz. 



= 277.42 in.» 



= 1.2010 U. S. gal. 



= 153.72 U. S. fl. oz. 



= 4546.1 cm. 3 



= 4.5460 1. 



D. Time: 



1 mean solar second (sec, s.) 



= 1.002738 sidereal seconds 

 1 mean solar minute (min., m.) 



= 60 sec. (mean solar) 

 1 mean solar hour (hr., h.) 



= 3600 sec. (mean solar) 



= 60 min. (mean solar) 

 1 mean solar day (da., d.) 



= 86400 sec. (mean solar) 



= 1440 min. (mean solar) 



= 24 hr. (mean solar) 



= 24 hours 3 minutes 56.555 seconds of mean sidereal time 

 1 tropical (mean solar, ordinary) year (yr.) 



= 31.5569 X 10* sec. (mean solar) 



= 525949 min. (mean solar) 



= 8765.81 hr. (mean solar) 



= 365.2422 da. (mean solar) 



= 366.2422 sidereal days 

 1 sidereal second 



= 0.997270 sec. (mean solar) 

 1 sidereal day 



= 86164.1 sec. (mean solar) 



= 23 hr. 56 min. 4.091 sec. (mean solar) 



Velocity; speed: 



1 meter per second (m. sec." 1 , mps) 

 = 3.6 km. hr." 1 

 = 1.94254 knots 

 = 2.23694 mi. hr." 1 

 = 3.28084 ft. sec." 1 

 = 196.850 ft. min." 1 

 = 0.77742 °lat. day 1 



1 kilometer per hour (km. hr. -1 , 

 kph) 



= 0.277778 m. sec." 1 

 = 0.539593 knot 

 = 0.621371 mi. hr." 1 

 = 0.911344 ft. sec." 1 

 = 0.21595 °lat. day" 1 



1 knot 



= 1 naut. mi. hr. -1 

 = 1.15155 mi. hr." 1 

 = 1.68895 ft. sec." 1 

 = 0.514791 m. sec." 1 

 = 1.85325 km. hr." 1 

 = 101.337 ft. min." 1 

 = 0.40021 s* 0.4 °lat. 



1 mile per hour (mi. hr. -1 , mph) 

 = 0.868391 knot 

 = 1.46667 ft. sec." 1 

 = 0.44704 m. sec. -1 

 = 1.609344 km. hr.- 1 

 = 88 ft. min." 1 

 = 0.34754 Mat. day" 1 



day" 



(continued) 



SMITHSONIAN METEOROLOGICAL TABLES 



