0 * 5 ) 
Other Inquiries Concerning! he Sea, 
The Tuhlifber of thefe Tracts knowing, that the Honorable Robert Boyle 
had not left unconfidered the Natural Hiftory of the Sea, of which 5ubje& 
the late, and thefe preterit Papers, have entertained the Reader as to the 
Obfervables of its Flux and Reflux ^ He was on this occafion inftant, with 
that Gentleman to impart to him, for publication, thefe Heads of Inquiries, 
he had drawn up, touching that Subje& : Which having obtained ( though 
the Author fo fires, they may be lookt upon as unfiniftit ) he thus fubjoyns. 
What is the Proportion of Salt, that is in the Water of differing Seas * 
And whether in the fame Sea it be always the fame i And if it be not, how 
much it differs ? 
What is the Gravity of Sea-waters in reference to Frefh Waters and to one 
another •„ Whether it vary not in Summer and Winter, and on other Scores? 
And whether in the fame Seafon its Gravity proceed only from the gteater or 
leffer Proportion of Salt, that is in it, and not fometimes from other Gau- 
fe$ I And what are the differing Gravities of the Sea- watet, accordingto 
she Climats,* 
What are the Odors, Colours 
: * This last Claufe containing a difficult Quaere 
and Tafts , olbfervable in Sea- a ,¥ ma y f°™ eth '«g ^d, Mr. Boy! 
f > tbtnks pt to note. That having recommended tilts 
Wa [ . , , , „ , matter, among others* to a learned Shyfnian, that 
What IS the depth Of the Sea was failing into America, and fumijhed him with 
in feveral places, and the Order « fmall Hydroftatieall Instrument* to obferve 
from time to time • th$ Differences of Garvity he 
might meet with : This account was returned him. 
That he found by the Glafs,the Sea water to in - 
creafe in weight, the nearer be came to the Line* 
till be arrived at a certain Degree of Latitude ; 
us he remembers , it was about the 3 oth,* after 
which, the Water feemed to retain the. fame fpe= 
£ ifc\ gravity, till be came to the Barbadoes, or > 
Jamaica. 
of its increafe and Decrements. 
And whether the Bottom of the 
Sea does always rife towards the 
Shore, unlefs accidentally in- 
terrupted ?■ 
Of the Bottom of the Sea, 
and how it differs from the Sur- 
face of the Earth, in reference 
to the Soyl, and Evennefs or Roughnefsof the Superficies • And the Stones, 
Minerals and jTetegables to be found there? 
What the Figuration of the Seas from North to Southland from Taft to 
Weft, and in the feveral Hemifpheres and Cli mats .? 
What communication there . is of Seas by Streights and Subterraneal 
Conveyances? 
-Of the Motion of the Sea by Winds, and how far Storms reach downwards 
towards the Bottom of the Sea i 
Of the grand Motions of the Bulk or Body of the Sea ^ efpecially of the 
^ides : Their Hiftory as to their Nature and Differences. 
The 
