WIND TABLES. 



Mean direction of the wind by Lambert's formula — 



Multiples of cos 45° ; form and example of computation . Table 48 



Values of the mean direction (a) or its complement (90 — a) 49 



Synoptic conversion of velocities Tablp: 50 



Miles per hour into feet per second Table 51 



Feet per second into miles per hour Table 52 



Metres per second into miles per hour Table 53 



Miles per hour into metres per second - • Table 54 



Metres per second into kilometres per hour Table 55 



Kilometres per hour into metres per second Table 56 



Beaufort wind scale and its conversion into velocity . . . Table 57 



147 



