(3^9) 
jFartial Edifks ., the Beginning and End, and in Total m<^% of 
fhort continuance in the Shadow, the Beginning and End of To- 
f^/darknefs j are unfit for nice Gbfemtions ^ by reafon of the 
flow change of Apfarences ^ which the oblique Motion of the 
Shadow then caufeth. For thefe reafons I fliall propound a Me- 
thod peculiarly defign'd forthe Accompliflimentof thQ Geographi- 
cal end in Obferving Lunar Eclipfes , free (as far as is poflible) 
from all the mentioned Inconveniences. 
For, Fir ft J It ftall not be pradicable without a Telefcope. 
Secondly^ The Obferver fliall alwayes have opportunity before 
his principal Obfervation, to note the Diftin£lion between the 
True shadow and the Temmbra. And, Thirdly , It fliall be appli- 
cable to thofeSeafons of theEelipfe , when there is the fuddeneft 
Alteration in the 
Let there be of the Eminentefl: ^/^/j , difperfed overall Quar- 
ters of the Moons Surface^ a feied: number generally agreed on^ 
to be conftantly made ufe of ^ to this purpofe , in ail parts of the 
World. As, for Example, thofe^ which i^ei'^//^ calleth ^ 
I Serorum, 
Let in each Ecliffey not all ^ but (forinftancej three of thefe 
Spots ^ which then lie neareft lothQ EcUptick , be exadlyobfer- 
ved, when they are firfl: touched by the rr^^ Shadow, andagain^ 
whcntheyare jufl: compleaily entredintoit , and (if you pleafe) 
alfo in 'the I>em^(e of the Eclipfe , when they are firft fully clear 
from the Tm Shadow: For the accurate determinations of which 
moments of time (that being in this bufinefs of main importance) 
let there be taken AMtndes ()i inmxkM^ Fixed ;>tm on this 
To fatifie all which intents 5 
Simi^ 
InfuU 
fide 
