ny one or more Perfons, that he wifi and {hall rlfolve fi&Qgefiim 
above-inentiorfd, vi%. Whether the Artificial Tangent-line be the 
true Meridian-line , yea or no f And if he do not 3 that then He will 
loofe, and tranfportto the other Party the whole benefit of the 
laft mentioned invention. But if 5 on the contrary,he do prove or 
difprove the Identity of the laid two lines, to the Judgment of 
fome able Mathematicians ,That then fo much money be paid 
him by the other Party 3 as the faid Invention wai valued. 
And, whereas there are often Wagers laid about things that 
concern the Engagers little or nothing 5 ’tis thought, that it 
would concern all Merchants, Marriners, and all Lovers of the 
common good, rather to lay wagers againft one another about 
things of this Nature, where the Gainer doth gain as well, as if 
he had laid his wager about fomething elfe; and the Loofer hath 
fo far the benefit as well as the Gaiuer 5 That he feeth thereby 
promoted the -thing -that concerns them both alike. 
Now therefore, to the end, that the Loofer may have his be- 
nefit by it, as well as the Gainer, it would not be amifs 3 that the 
condition were made thus,that the latter fhould grant the moity 
of his gain to the Propofer $ that thereby he might be enabled to 
bring to light both rllofej and Lome other ufeful inventions, for 
the Service of Mankind . And to maoifeft, that it is not for his 
©wn interefb onely, that the Propofer mentions this , he is willing 
to impart from that meaty, fo received 5 the full moity again to 
any other perfon within Isis Majefties Dominions., who fhall firft 
of all give notice of his Undertaking to prove or difprove the 
faid.Identity 5 and perform it accordingly within the fpace of two 
Months, to be computed fromthe prefent Date.Thofe that have 
a mind to engage, may repair to the Printers of thefe Trads 3 
where, they may know further. 
Anm Contrivance of Wheel-Barometer, much more eafyto 
be prepared, that? that, which is dtferibed in the Microgra*. 
phy ; imparted, by the Author of that Book, 
This is only an eafie way of apply ing anlndex to any Common 
Bato/coft whfetkef tHe Glafs be only a Single Cane, or have a 
round Bolthead at the top. And by the means thereof, the 
V’ariatio'm 
