if poffible, two exad obfervations of her ^pp(*rm p\^ctt» 
rnong the Fm 7?^r/ being made, at two places thus diftamtin 
Latitude, and as near as may be under the fame Mmi^^;/, by 
ihcfe Obfer^ators concurring at the fametime, her true and 
exa<!t* dtftance may be hence collected, not onely for that 
time, but at all other times, by any fingle Obfervator's view- 
ing her vJithzTekfcQpe^ and meafuring exaitly h^v Jfiparem 
Diameter. It were likewife defirable,' that as often as ther^ 
happens any confiderable ^rZ/^/J of the J^/j, that this alfo 
might be obferved by them, noting therein thtesaSl mea- 
fureof the greateft Obfcurationcompared with the then 
pare7it Diameter of his Disk, For by this means^ after the di^ 
ttanpe of the Moon hath been exa<5lly found^the diftance of the 
Sun will eafily T3e deduced, 
A$ for th@ time 3 fitteft for making Obfervations of the 
'Mo&n^ that will bejwhenflieis about a Quarter or fomewha: 
iefs illuminated^ beeaufe then her light is nDtfo bright, but 
that with a good Telefcope flie may be obftrvM to pafs clofe 
^by,^ and fometimes'^ver feveral Fixt ficirs 5 which is about 
four or five days before or after her Change i Or elfe at any 
other timSj when the "t^lodn pafles near or over fome of the 
bigger fort of Fi^t Jhn, fuch as of the firftorfecondM<j^^. 
mtude I .which may be eafily calculated and forefeen ; Or beft 
pf a!!, 'when ilwfQ k zny T^taS Eclipfe. of ih^JUsom for then 
the fmalleftT^/^j^#/?i>^//^r/ may be feen clofe adjoyning to the 
very body of die Mo^n, Of all which particulars the two 
Correfpondents are to agree^ as iooo as he^that is tojoyn a« 
broad, fliallb^ found out 1 whereupon they are mutually to 
.communicate to each otber^what they fhall have thus obferved 
in each place* 
Of an Ohfervmion^ not iongfince made in^ng- 
knd^ of Saturn. 
This Obfervatioa was made by Mr, Wikim BaHj accom- 
panied 
