the tdp^ in what proportion of time and fwiftncfs it rifes. He 
fecms not to have confider'd^ that in this Experiment, the times 
ofthedefcent and aflfent arc both taken; and computed toge- 
ther ; (o thatjfor this purpofe, there needs not that nicety, he 
difcourfes of. 
fQurthly^ Whereas 'tis further excepted, That this way of 
Sounding depths is no new invention jThe anfwer is ready, that 
neither is it pretended to be fo,in the often quoted TraU ; it be- 
ing only intimated there, that the mapnerot performing it, as 
'tis in chat place reprcfented and defcribed, is new. 
Lajily, To redific the faid Author's miftake^ as if the inftru- 
ment of Fetching up water from the bottom of the Sea,werc 
Ehiefly contriv'd, to find out, Whether in fome places of the fea 
tiiy 5???^^^ water is to be met with at the bottom: There will 
need no more, tha^i Codirs^ him to the Book it felf "Num. 9. 
where p. 149. towards the end, the firfi ufc of this Buchft is ex- 
prefPd to be, to know the degrees ef Sahnefs of the water accor- 
ding to Its nearnefs to the top or bottomjor rather to know the 
conftitution ofthe Sea- water in feveral depths of feveral Climate 
which is amatter,much better to be found out by Tr?W/^than 
Difieurfe. Neither is it any where argued in that Book ( as the 
Fremh Ieurnarm^iu\i2LX.Q% ) that, bccaufe fweet water is found at 
the bottom of the Sea oiBaharem^ therefore it mufl^ but only 
that it may, be found fo elfewhcre. And linee the fame lournal 
admits, that thofe Sweet water.fprings, which yield the fwect 
water, that is found at the faid place, have been formerly on the 
Contimnt,(aT enough from the fea,which hath afterwards cover'd 
them ; It will be, 'tis prelum'd, lawful to ask, Why in many o- 
ther places there may not be found the like ? And befides, how 
we do know^but that there may be in other parts, Eruptions of 
large fprings at the bottom of the Sea.as well as there. 
Prmtcd with Licence for John MariynfinA James Allefiry^ 
Printers to the Royal Society. 1666. 
