i$ Theory of the Tides at the Baro/Tunking hy the 
Learned Mr. Edm. Halley^ fellow of the Royal So- 
ciety. 
THe efFedt of the Moan upon the waters^ in the proda- 
(ition of the tides in this port of Tunking^ is the more 
wonderful and furprizing, in that it feemes different in all 
its circumftances from th^gefieralrule^ whereby the moti- 
on oi th^ Sea is regulated, in all other parts of the world I 
have yet heard of. For firft, ^2ic\i]lux is of about 12 
hours duration, and its correlpondent reflux^ as long, lo 
that there is but one high water in 2.4 hours. Then there 
are in each month, two inter mijfions of the Tides, about 14 
dayes afunder when there is no fenfible/W or rifing of 
the waters to be obferved but the Sea is in a manner 
ftagnant. Thirdly, that the inereafe of the Water has 
its I ^ days period, b^tWQtn the afovcizid intermijlions ^ 
and at 7 days end, makes the bigheft tides^ from which , 
time the water again gradually abates, and the is 
weaker till it comes to a ftagnation, both increa/e and 
^il^i?r^^?/^obferving the fame r2^/^ in being exceeding j/Zcti? 
in their begining and end, and /wift in the middle, 
taftly, (and which is moft odd) the rifng Moon in the 
one half of each month makes high water, and the Jetting 
moone in the other half, Thefe particulars conlidered to- 
gether with the Tables fliewing fhe days ot the waters 
Itagnation, in each moneth, gave me alight into the 
iecretof this ftrange appearance, fo as to be able to bdng 
the hitherto unaccountable irregularity of thtie Tides 
to a certain rule. And firft it appears by the latter of 
the two Tables^ that the Intermiffions of the Tides hap- 
pen nearly upon thofe days^ that the enters the 
figns of ^ries and Libra ; or paffes the EquinoBial i which 
^ divides the M?o«j* courfe nearly into two equal parts, as 
WQlVasthc Sms^ and from hence it{o\\o%sthatthQTro' 
pical 
