f JM ) 
This ia what I have thought proper to communicate 
q i my abovefaid Obfervations » and* with great Reipe& 
I. remain. 
Tour mofi humble Servant •, 
• • * t / * ^ / j i ^ ^ j** f v* 
Anthony van Leeuwenhoek- 
II. ObferVations of the Eclipfe of the Moon, on 
Jan. ii. 1711-12. By the Revd. Mr Wm. 
Derham, F. (^. S. In a Letter to. Rich. Wallen 
Efqy R* S. Seer . 
5 i n, 
Vpminfier, Jan. 14. 1715. 
S Aturday Evening being clear, gave me a good op- 
portunity of obferving the Lunar Eclipfe. The 
Times ate very nice, and the Obfervations made with, 
an excellent Six-foot Telefcope, as followetlu 
h 11 
6. 15 A duskKhnefs upon the N. Baft fide of the Moon* 
6.. 36 A. thick Pemmbra on the Moon. 
6 * 37 The Penumbra fo denfe, that it may. be taken, 
for the Beginning of the Eclipfe. 
6. £9 The Eclipfe undoubtedly is begun.. 
42 The. Shadow fo dark, that.it nearly. bicL the.- 
Moons N.Eafternl.y Limb* 
p. 23 Moons Diameter by the.MicrorEeter.t6 t.a. equal, 
parts^ equal to 3.1 f zff 
