( 7h ) 
Telefcope of 115 Foot length, with the Apparatus for 
ufingthem without a Tube; by help whereof we might 
have fatisfied our fdves of the reality of rhefe Difco- . 
veries. But thofe here that firft tried to make ufe of 
this Glafs, finding, for want of Pradice, feme difficul- 
ties in the Management thereof, were the cccafion of its 
being laid afide for fome time. Afterwards it was dc- - 
figned for making perpendicular Obfervations of the fixt 
Stars paffing by our Zenith, to try if the Parallax of 
the Earths annual Orb might not be made fenfible in 
fo great a Radius, according to what Dr. Hook had 
long fince propofed : but in this we mifearried alfo, for 
want of a place of fufficient height and firmnefs, where- 
on to fix the Objedt Glafs, fo that it lay by negleded 
for many Years. 
In the mean time we could not but remark a great re- 
(erve in x.\\q French Aftronomers, in relation to thefe Sa- 
tellites, of which they have given us in their Yearly 
Memoirs no Obfervations till very lately, nor have they 
feetned willing to ihew them in their GlafTes to fuch as 
fequefied it: fo that rdimight poffibly occafion in fome 
Perfons a fufpicionof the reality of this Difeovery : And 
the Reverend Mr. William Derham having borrowed of 
the ‘■-ociety their long Glafs, could not thereby aflure - 
himfelf that the fmall Stars he fomecimes found about 
Saturn, were really his Satellites, their ficuatipn not a- 
greeing with their places derived from the Tables of 
their Motions exhibited in N°. 187. of fhil, Tranfa3. 
befides that he wanted a fufficient height to raife the Ob- 
jedf Glafs, fo as to v {c:\st Saturn to advantage, above the 
Vapour- of the Horizon But Memoirs for £714, 
publifhed bur about a Vtar fince M.CaJieni, the worthy 
SuccelTor ot his great Father, has given us fomeCbler- 
vations which clear up the i oinc, and by (licwing the er- 
rors of thole iirit Tables, has enabled us to be affured, 
that 
