240 W. Dennis on the Theory of the Tides. 
have taken under the influence of the sun’s attraction alone and 
brought for the time somewhat nearer to the sun. 
Again, when the two attracting bodies are on opposite sides of 
the earth at full moon, it will be found that the result should 
held suspended by the sun’s attraction without regard to the 
moon’s position or action upon it. hile thus held or sus 
pended, the moon by its attraction draws it somewhat out of the 
course it would otherwise pursue, bringing it now a little nearer 
to the sun and then taking it a little farther from it, at one ime 
hurrying it onward and again retarding it somewhat, (move 
ments necessarily resulting from that revolution of the earth 
about the common centre of gravity of itself and the moon ber 
fore explained) ; but this by-play between the earth and the moon 
in no way essentially affects the relation existing between the 
earth and the sun: the former unceasingly pursues its orbit 
course around the latter, which must therefore constantly hold 
same direction (at néw moon) conspire to produce a 
namely, the spring tides of new moon, seems hardly to require 
separate illustration. It is as if the power of one of these born 
were temporarily increased, which would of course produce am 
increased result, It may however be illustrated by 4 ™ ike 
tion of the apparatus before described. Let the flexible globe be 
suspended by three*weights with pulleys, representing a5 ™ 
former case the sun’s attraction, the weights being now con ae" 
With the several parts of the globe by elastic cords or bands, 
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