C ] 
an Inftrument we take her Diameter, both in one poftui e 
and t'other, we ifhall findl:hat ftill fhe fhall be but 30 Mi« 
nutes ; the feveral ways of trying j:his I will not Mention^ 
they being as Various as are the Methods of taking the 
Moons apparent Diameter, common enough amongft the 
Aftronomers ; neither will I infift upon the truth of the 
Matter of Faft, for that I think cannot reafonably be 
queftioned, after fo many tryals and fo many experiments 
thereof, faithfully recorded by undoubted witneffes; and 
it would be very unreaCbnable to Imagine that fb many 
Authors ftiould rack their Brains for folving an appea- 
rance, wherein they were not certain of the matter of Fa£t. 
But becaufe of Nullius in Verha^Y can aflert that I have ac- 
curately tryed it my felfe, and 1 have fo found it .- one of 
the ways I proceeded was thus, I took a very good 2>/^- 
fcofeoi about 6 foot long, in the inward Focus whole 
Eye-Glafs I apply'^d a very fine Lattice made of the fingle 
hairs of a Mans Head; then Looking with this at the 
Moon when fhe was juft Rifen and Lopked Extraordina- 
rily big, I obferved what Number of the fquares of the 
Lattice were Occupy'd by her body ; then obferving her 
again, when niore Elevated and free from all Extravagant 
greatnels, 1 ftill found the lame fquares of the Lettice 
pofTeffed by her. This way is Equivalent to that now 
more ufed, of taking her Diameter by Mr. Townlys Micro- 
meters : but I have alfb tryed and found the fame thing by 
an Accurate Sextant, taking -the diftance of the Moons 
Oppofite Limbs. 
Now this Pb^f7o?nen^n affords two tilings to be con- 
fiderd, firft why the Moon ( I ftill name the Moon as be» 
ingan ObjeQ: more adapted for our fight^ for the fame 
thing holds in the Sun ) fhould feem bigger about the 
Honz-onytlim when more elevated; and fecondly, ITiee 
appearing bigger, how it comes to pafs, that her Diameter 
bemg taken, it is no greater then when fhe appears lefs. 
But the Difquifition concerning this latter being likely to 
11 r * Com- 
