TIDES. 
41 
to a ! n , coriSe< l llence of its great distance, this only amounts 
ine'craahT y ei m \ t hll ^ dredtl1 part of that of tlie earth’s satellite. The 
exceeding IT hl ? . betweea the solar ^<1 lunar days— the latter 
to or Jit . e + fir8t h 7 fifty ' toilv ™nutes — has also the effect of adding 
moon ■ ■ UlCtulg . rom this forcs alternately. When the sun and 
(Kg. 6), or in opposition, that is to say, 
bincd - LII .l lP ‘"'Vf lm6 ’ bbeir attraction on tiro sea is com- 
th« » It Z V » P"' ®>is happens at the period of 
ii’its l:i\ z m r m \ M ite i ™ 1 » f »• 
’ e and last garters, the solar action, being 
Sun. 
Fi S- 6. Lunar-Solar Tides. 
ST ‘° “ ° f * ltacli »". *«“ *• produce a sensibly wed.,: 
o^e^TeTEtoif “-‘to impulsi 
>be highest and lowest tides tail” neadv L th !™ ” **““ J,Jt 
« ot 7 io 3. The highest tides ^?ZT*T « «* » « 
moon is in nerW, . n,® i . , dt tlie equinoxes, when th. 
Io our peTanT,’, 1 2 «**-. # » in .poge, 
hours, when it is n f WT*’ *** ™ as twiee in twenty-fou 
»ter th!! “* .*° h, S h ">ter ■ when it retires, it is 
The Kd! respectively the /me and „f„ of tie w 
Me is retarded every da, about Ml, minutes, the lunar d. : 
