panied by his brother^ Dr, Ball, OUokr i^. i€6$\ a£ fix of 
the Clock, at M&inhead moit Exeter m Devon/hire^with a vtrj 
good Tele/cope mi^t ^ifootlong^ and a doable Eye^glafs, as 
the obfcrver himfelf takes notice, adding, that he never faw 
that Planet mote diftin<a:. The obfervation is reprefcnted by 
Figure 5. concerning whieh^ the Author faith in his letter to a 
friend, as follows s This appear'd tome theprcfent figure of 
Saturn^ fomewhat otherwife, than I eKped:ed<, thinkiuig it 
would have been decreafing, but I found it full as ever, and a 
litde hollow above and below. Whereupon tile Perfon^ to 
whom notice was fent hereof 3 examining this fhape, hath by 
Letters defired the worthy Author o( the Syfieme of this Plt^ 
net J that he would now attentively confider the prefent Fiji^ure 
of-hh Jr^fes ot^n^.to fee whether the appearance be to him, as 
in this Figure^ and confequently whether hc^ there meets with 
nothing,that may make him thinks that it is noi one body of a 
Circular Figure, that embraces his Buhe^hni two. 
And to the end that other Curious menjn other places might 
be engagedjto joyn theirObfervations with him^to fee, whether 
they can find the like appearance to that, reprefented here^ 
efpecially fuch Notches or Hollownefles, as at A and B, it was 
thought fit to infert here the newly related Account. 
and their Refults. 
Modern Fhilofophers, to avoyd CircumloeutionSj call that In» 
itrument, wherein a Cylinder of Quicklilver, of between ^Ji 
and 3 1 . Inches in Altitude,is kept fufpended after the manner 
of the Torricellian Experiment , a Barometex or Bar©fcope 5 firft 
madepublick by that Noble Searcher of Nature. Mr. Beyh^ 
and imployed by Him and others,; to deted: all the minut va- 
riations in the PrelTure and weight of the Air, For the mor© 
cunons 
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