( in ) s 
7. 25' The diftance of the Shadow from the -opposite 
luminous Limb of the Moon, reprefented by the 
Line /. u. was 1025 P arts °f the Micrometer, e~ 
qual to 20 Minutes. 
8. $ 1 End of the Eclipfe is very near, 
8. 32 End of the Eclipfe. 
8 . 32 45" Eclipfe is undoubtedly ended- 
8 . 36 A Penumbra is left. * 
It unluckily fell out, that I difordered my Microme- 
ter at the Beginning of the Eclipfe 5 fo that I could 
not take with any exaftnefs the Inclination of the Cufps, 
and fome other Matters T had a mind to have obferved 3 
to fupply which deleft in fome meafure, I have fent you 
a Type of the Eclipfe as well as I could by guefs. And 
from the fame defeft I cannot warrant the Micromerri« 
cal Meafures of the Moon’s Diameter, and her eclipfed 
Parts to be other wife, than fomewhat near the truth $ 
perhaps not exaftly true. 
Fig* 4. A Type of the Lunar Eclipfe Jan. 12. 171 1-12. 
m. u c . r . reprefents the twoClafpers of the Micrometer, 
parallel to the Equator. 
N. The Northern, S. the Southern part of the Moons 
Disk, running between the Clafpers of the Micrometer. 
l.u. The enlightned part of the Moon, being 102,5 
Micrometrical Parts, or 20' 
I am forry I had not Heveliu/s Map of the Moon, to 
have noted the Spots the Shadow pafied over 3 but I 
hope to mend that defeft, if I live to obferve another 
Lunar Eclipfe. With great Refpeft I am 
Tour moji humble Servant^ 
W. DERHAM. 
B b b b 2 
III. Some 
