( ) 
The tmlfth,dif€om{(isof an hn.kth of wr^tmg arty thing in ar- 
ny Tongue, to be read and underftood by any JNation of what Lan» 
guage foever , and of reading and underjlandmg any thing written 
in any Tongue. 
The thirteenth^ contains fomeconfiderable EfFefls and Experi- 
ments of the Air pump^ partly made by others , partly faid by 
our Author to have been devifed and tryed by himfelfj aliredu- 
ced to their proper Caufes. 
JhQ fourteenth, declareth the llfes and Reafons of the Effeas of 
Hygrometers and Chronometers. 
The fifteenth J explains the ftrudure of Microfcopes and 
TelefcopeSj comprobating their Effefls from many Obfervaci- 
cns. 
T^qUJI, exhibits divers pleafanc i'peftaclcs of a portaHe dark. 
nedRooiBj and of a Catoptro-Dioptrical Lantern, adding the 
genuin Reafons of them ; and for an Appendix fubjoy ns his new,as 
he efteems it. Perpetual Almanack, comprehendiDg not only the 
Immoveable Feafts fixed to certain days of (he Months^ butalfo 
the Moveable ones, of Eafl[er,Pentecoft, and the reft depending 
from them ; as alfo the Motions of the Sun and Moon through the 
twelve celeftial Signs , together with the Moons menftrual increa- 
fes and decreafes,^^r. 
Having difpatched this, he takes notice, that reflefling upon 
what he had done and difcoarfed in the former ?apers,he found it: 
not amifs to write fome-^^/^^W/xe^ to the Efiys before recited,, 
fupplying therein p^rtly^ what in his Philofophica! Colledg had 
been by word of mouth noted in reference to the above-mentioned • 
ph^pnomena and conclufions *, pml}^^ what had been thought fit to 
add to them by way of Illuftration, upon a fecond pcrufal and ex- 
amination of the fame. 
And in this part hefirfi difcourfes more particularly of the di» . 
vingEngin and Divers J ax)d then^ of the V/eight of the Air, ac- 
knowledged by Jrifiotle himfelf to gravitate in its own place ; al- 
ledgingforthac purporeoutofr.4. of his C^lo, thefe 
remarkable \vords;lj' tm ccvt^ yi^ x'^^^ ^Iv-r^ \yji 'XKh ^rvjo?, 1^ % 
oi ByUrchicd pr\viC\p\Q oi Dr Henry Moor, which he exa- 
mins ; alledging, not to have yet feen what he hears M^'.BojIe hath 
written upon that Argument in EnglipJ. Fourthly^ of the new 
Pocket» 
