218 Wisconsi/i Academy of Sciences, Arts and Letters. 



required to reach the position o£ the moon is not considered, 

 there are times, however, when the tide is under the moon, but, 

 if we find the moon over a low water, we will also find the parent 

 wave in deep water on on the same meridian. 



The same author, in the Messenger, Farther says : " And as 

 when the mooa approaches the meridian of Babelmandeb the 

 the water will fall there but continues its elevation on each side 

 as at Tonquin and in the Mozambique channel," also, "the tide 

 remaining up so long at Tonquin gave rise to the notion, very 

 strangely indeed, that two tides met at that place." 



It is merely necessary to examine the facts in both these cases 

 and we will find that the falling water at Babelmandeb is the tide 

 of the moon's previous transit, while tide in the Mozambique 

 ohannei is that of the immediate transit which culminates with 

 the moon in tlie Indian ocean in longitude 80" E , but does not 

 culminate in the Mozambique until the moon has reached longi- 

 tude 20° W. The tide at Tonquin is a part of the Pacific tide 

 which enters the China sea through the Bashee and Bilintang 

 channels between Formosa and Luzon and also a small tide from 

 the Balabec straits, these unite before reaching the Gulf of Ton- 

 quin, leaving a regular tide of 4 to six feet. There is, however, 

 a tide from the Indian ocean through Mallacca and Sunda Straits 

 which causes interferance in the Gulf of Siam, a body of water 

 similar to the Gulf of Tonquin but ten degrees of latitude nearer 

 the equator; the spring tides are only two feet at the entrance 

 but increase at the head of the gulf, so that the tide at Cape L'ant 

 is seven feet, the time, however, is disturbed, so that the tide rises 

 three hours and falls nine. 



The irregularities of the tide in the Straits of Magellan are 

 drawn upon to favor the theory by repulsion. These tides are 

 such as would serve any desirable purpose. When the moon is 

 over the Atlantic the tide of the pi'evious transit begins to rise at 

 Cape Virgins, so also the tide at Cape Pillar on the Pacific side 

 and in Cockburn Channel. 



During three hours when the moon is over the Atlantic the tide 

 at Cape Pillar does three honrs of its rising phase, at Cockburn 

 Channel the last two of falling and the first of rising and at Cape 



