Nov. i, 1885.] The Australasian Scientific Magazine. 131 
action of gravitation for 20 deg. or 30 deg. arther round the waters are 
found running down-hill to supply the place of those drawn away by the 
moon’s attraction. As sufficient time is not obtained for gaining a uni- 
form level, we have therefore continually an apparent high water on the 
opposite side of the earth from our satellite, but which is in reality only 
the ordinary level of the ocean, low water at both sides giving it the appear- 
ance of bulging out beyond the general line of our globe’s circumference. 
As similarly remarked before, what is taken away from the western side to 
form the tidal wave, is replaced by an equal amount flowing with an equal 
velocity on the eastern side, so that no diminution in the ordinary level or 
high water, as it is called, on the opposite side from the moon is to be ob- 
served. Slight reference only need be made to the sun’s influence on the 
tides. He exerts a similar force and in the very same manner as has been 
explained regarding the moon but in a lesser degree owing to his vastly 
greater distance from our globe. That the phenomena of spring and neap 
tides are owing to the sun’s place in the heaven’s with regard to the moon 
is well known, but particulars need not be discussed, inasmuch as the 
object of this paper is simply to state the broad principle upon which the 
explanation of the tides and the motive power of winds and currents rests. 
Details have, therefore, been most studiously avoided, and in the absence 
of diagrams many points of interest bearing on the subject have necessarily 
been left untouched. 
Such, then, is the manner in which the sun and moon affect the 
motions of both air and water on the surface of our globe, and the way 
in which these motions may be satisfactorily explained. The theory- 
advanced is not partial in its application, but fully accounts for the whole 
of the phenomena of winds, tides and ocean currents, supplying a felt 
want, and is deserving the attention of those whose special training 
opportunities and acquirements render them competent to deal with the 
subject in all its interesting relations and details. 
