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ILjererniae EovfoccnJngli Opera Pojthumai una ^r^m GuilXrab- 
traei Obfervationibm C jejiibm nec non Joh» Flamftedii de 
Temporis Mquatione DiamhayNumer?^^^^ ad novum 
LVNM Syjiema Hovrocciu tohdim, mpenp Joh. Martyn, 
J^, SoctetaUs Typographic AM\672.in 
^'"T^His Horroxhihtizmtmihhxxn , that is the Author of 
J[ thatexGellent Tract5Ca!Ied VenminSole vtfa, publiih'tby 
ththmom Johannes Heveltus together with his Mercurius in 
S$le vi[us: who if he had not been fnatch't away by an untime- 
ly death in the flower of his age^ would certainly, by his indu- 
ftry and exaccnefs, which did accompany his great affection to 
Aftronomy, have very confiderably advanced that Science. 
Now we have only leftus thefe imperfect Papers, digeftedjUot 
without great care and labour, by that Learned Mathematicir 
an Dr^ John Wallis > Wherein does occurr, 
Firfic the K^pkrian Aftronomy , afferted and promoted 5 
which this Author undertook^ after he had fpent much time, 
and taken great pains in acqaaincing himfelf with that ofLarif- 
bergius^ which he at firft embraced with fo much eagernefs and 
additioDj that it was difficult to divorce him from it 5 tillat 
lengthy by the advertifements of JFi/?/^i7a Cr^j^/fw, a fagacious 
and diligent Aflrronomer of that time, he found, that neither 
ihtHypothefes ofLanfbeygius were coniiflent among themfelves, 
nor his T<3^/^j" agreed with Obfervacions exactly made, nor 
the Precepts of them were well demonftrated or could be j 
whatever that man boafted of the wonderful! agreement of 
his Table f with the Obfervations of former times : AH which 
errors having been found atlaft by our Author himfelf, and 
withall the writings of K^pler^ and the Rudolphin tables by him 
feareh*t into, he faw caufe far to prefer them to the Lanshergi- 
««,becaufe grounded upon confonaot toNaturCjaad 
well agreeing with the Heavens : though he found caufe by 
his accurate Obfervations to amend even thefe Tables 5 yet 
without a necefficy of changing the Hy;?o/fi6f/i^ In which wori 
when he was well engaged^he was cut off by death very youn^^ 
ifl the 23th year of his age. His firfl piece then, were his De- 
putations againft the Aftronomy of l^anfbergius,, in which hp 
clearly deraonflrates^ that the Hypothefes of that Author do -lei- 
ther agree with the Heavens nor among themfelves* VV^i^^ 
2^ amenthe carried'oulb^iar, thathaving finiili't ih^fout?^^^ 
