Appendix I 

 EQUIVALENTS AND CONSTANTS 



EQUIVALENT VELOCITIES 



1 knot =1.69 feet per second =1.15 miles per hour. 

 1 foot per second=0.592 knot=0.682 mile per hour. 

 1 mile per hour =0.868 knot = 1.467 feet per second. 



LUNAR TIMES 



Mean interval between lunar transits= 12.42 mean solar hours. 

 1 mean lunar hour =1.035 mean solar hours. 

 1 mean solar hour =0.966 mean lunar hours. 



MEAN SPEED, m2, OF SEMIDIURNAL LUNAR TIDE 



In degrees per hour, 28.9841 

 In degrees per second, 0.008051 

 In radians per second, 0.00014052 



log 1.46216 

 log 7.90586 — 10 

 log 6.14774-10 



Table XI. — m.2t in degrees and minutes, for integral values af t from to 69 



Acceleration of gravity, g, at sea level, varies from 32.089 feet per 

 second at earth's equator, to 32.234 at poles. 



Taking g=32.lQ log 1.50732 



ni2/^=0.000,00437 log 4.64042-10 



^/m2 = 228,890 log 5.35958 



CIRCULAR CONSTANTS 



x=3. 14159 

 27r/360 = 0.01745 



8/37r=0.8488 

 37r/8 = 1.1781 



V37r/8= 1.0854 



log 0.49715 

 log 8.24188 

 log 9.92882 

 log 0.07118 

 loo- 0.03559 



(259) 



