thinks) that the Hajfian Obfervations are in many things 
more accurate, f though they ufed the fame kind oi 
Sights^ than thofe of Ty^/'^?; becaufe, there, the Obfer- 
vations were conftantly made by 'B^thman and Brig^ two 
diligent men. 
The 20'^. is oi Bullialdus to the Author^ returning 
thanks for imparting a copy of his letters to Mr. Flamjied 
(as at Ep. 13. for that of Ep. n. to Mr. Oldenburg-^) 
concurring with him therein; efteeming the ufe ofglaf- 
fes, lefs certain (becaufe of the uncertain refradionsj 
than Plain Sights, 
The 21^. and 22*^. from Mr. Oldenburg, teftifyeth^ 
from the I{oyal Society, their continued efteem of the 
Author, and of his ftudies and labours, notwithltand- 
ing the artifices of fome to the contrary ; and that they 
were not privy to Mr. //,!?i?/^s publiihiag his Animadvert 
Jions, Giving a more fair characSter of Mr. Flamjied. 
The 23"^. of the Author to Mr. Oldenburg^ fignifieth; 
thatheisnot difpleafed with Mr. Flamjied, (or othersj 
for ufing Glafles 5 which he allows in many cafes ("efpe- 
eially to thofe who are fhort-fightedj to be of good 
ufe 5 and commends in particular the Micrometer as an 
excellent Inftrument for fmal dittances. But defires 
that they will, without offenfe, permit him to ufe 
(what he finds beftj Flain Sights. Which (where his Ey- 
fight ferves^ he thinks much better .-^ And, if he were 
BOW to begin that great work, of refloring the fixed 
Stars (about which he had been fo long imployedj he 
fhould take the fame courfe as hitherto, by n^mg Flain 
Sights, Wifhing, that fome of thofe who are fo fond 
of TelefcQpes, were with him to difcourfe the matter, 
and fee his Obfervations ^ and he beleeves they would 
then be of another mind. 
The 25-'^. from the Author to Dr. Grew (thtn Secret 
tary to the ^yal Society, after the death of Mr. Olden-* 
hurg,) andthe 2d'^ to Dethlevus Cluver s fignify the ar-^ 
F f 3 rival. 
