C 3'4 1 
Concerning the Apparent Magnitude of the Sun and 
MooHj or the Apparent Diflance of two StarSy 
when nigh the Horizon, and when Higher ele-* 
<vated. 
I Do not De%ne fo much to eftablifli any thing of my 
own that may be fatisfaftory in fblving this admira- 
ble appearance, as to detefl: the Errors of thofe that have 
offered at afolution thereof, and have come fhort as I 
Conceive j of being fatisfaftory ; that thereby I may ar. 
gain fett the minds of Philofophers on Work, and roufe 
them up to enquire a new after this iiirprifing P/'^;^?^^^^^ 
non. That I may doe this the more Effe£tualy, I fhall 
breifly declare the Matter of FaQ: and then proceed to 
the Reafon thereof, given by ftveral, and to their Confu- 
tations. 
Firfl: therefore it is well known that the mean appa- 
rent Magnitude of the Moon is 50 m. ^of, wq will take 
it Namero Rotunda to de jo , that is, an Arch of a great 
Circle in the Heavens of 50 Minuts is covered by her Di- 
.ameter, and this we'll fuppole to be her apparent Diame- 
ter, at a full Moon in the midft of Winter, and when 
file's in tlie Meridian, and at her greateft Northern Lati- 
tude and Confequently the utrriQit that (he can be elevated 
in our Honz/m ; tisas well known alio that when fhe is 
in this Pofture, being Looked upon by the Naked Eye 
llie appears fthat W'e may accomodate all to fenfibleMea- 
fiires ) to be Magnitudinis Pedaiu^ about a foot broad. 
But the fame Moon ' eing Looked upon juft as fhe rifes, 
llie appears to be three or four foot broad, and yet if with 
an 
