Spri ngs, Rivers, and the Sea. 137 



Upon the day of every new moon, being 

 nearly at the same hour ; and three quar- 

 ters of an hour later every succeeding day* 



The attraction of the sun also produ- 

 ces a similar rising and falling of the wa- 

 ter of the ocean, but on account of its dis- 

 tance, not near so considerable as that 

 which is produced by the moon* It will 

 be readily understood that according to 

 the different situations of the sun and 

 the moon, the tides which are raised by 

 their respective attraction, will either con- 

 spire with, or counteract each other in a 

 greater or lesser degree. When they con- 

 spire together the tides rise higher, and 

 their mutual action produces what are cal- 

 led spring 1 tides* On the contrary, when 

 they counteract each other they produce 

 ntap tides. \ 



From a slight consideration of what 

 has been said, we might be led to imagine 

 that the time of high water at any place, 

 would be when the moon is over the me* 

 ridian of that place. But this is by no 

 means the case ; it being usually about 

 three hours afterwards : the reason of 

 which may be shown as follows. The 

 moon 3 when she 15 on the meridian, or 

 M 



