74 



tides at both stations to differ by more than half a foot from those 

 predicted; but most of the observed heights were within half a foot 

 of the predictions (The Tide, Marmer, p. 205, et seq.). 



cJ 3 



i2 



1 1^ 



fo\ / 



— / ^^ 



o 



6 la 6 



AM PM 



June ^5, 1935- 



o\ / 



6 

 AM 



\e 



6 

 PM 



IS 



FiGUEE 30.— Recorded and predicted tides, San Francisco (predicted tides enclosed in circles). 



The plot in figure 30 of the recorded tides and the predicted high 

 and low waters at San Francisco, Calif., on 2 days chosen at random, 

 indicates the correspondence ordinarily to be expected. 



