( ) 
Other Imperfeilions in the pronouncing fome Sou^Js (of 
our own or other Languages :) A!l which he haih exer- 
cifed with good Succeis, and doth here give an Account 
of the Method whereby he hath done ir. The which 
^ Letter (in EngHlli) we have given an Account in 145-. 
And, Laftly, here is a Letter of Mr. Flamfleed ; where- 
in he gives an Account of a very remarkable Difcovery 
of the Parallaxis of the 'Earth' s Annual Orb, obfervable 
in fome of the fxed Stars. Which is a noble Phatto- 
menon, diligently fought after, for fome Ages, but hi- 
therto without Succefs • and now at length difcovered 
in England^ and confirmed by the concurrent Obferva- 
tions of Eight Years, compared together. -By which 
the Copernkan HypotheHs (as it is wont to be called) 
feems to be clearly eftabliihed. 
After thefe Treatifes, (more particularly Mathemati- 
cal^ he fubjoins divers other Mifcellaneous Trails; which 
(though not fo purely Mathematical) may at leaft be ac- 
ceptable to inuqifuive Perlbns, and (hew how ufefui 
Mathematicks are in moft other Studies. Where the 
Author has fodextroufly and fuccefsfully applied them. 
Amongft thefe, in the firft place, appears his Tra£lui 
de Loquela^ Grammaticc-PhyJicuSj (firft publifhed in the 
Year 165-3, ^^^^ reprinted many times,-) wherein 
he gives a very particular Account of the Phyfical or 
Mechanical Formation of all Sounds ufed in Speech, (ex- 
prefled by the Letters of feveral Languages :) A Defign 
which is not known to have been (before him) under- 
taken by any Perfon : In Purfuance of which he hath 
undertaken (with Succefs) to teach fome DumbPerfons 
to fpeak. ^ 
To this is adjoined a Grammar of the Englijh Tongue^ 
adapted to the peculiar Genius of this Language ,• very 
different from that of the Greek and Latine Languages. 
Whereby the Language is rendred very eafie, and 
clear 
