OiO ) 
Female is Impregnated 5 and the fame may be applied 
to other Creatures. Thefe are all the Obfervadons I 
(hall trouble you with at prefent, and remain, 
»S/r, 
Tours to Jerve you, 
Anthony van Leeuwenhoek. 
III. A Letter from Mr Ralph Thoresby, F. S. 
to Dr. Hans Sloan e, S. Seer. Giving an Ac- 
count of a Lunar ([{ain-Dow feen in Darbyfhire, 
and of a Storm of Thunder and Lightning which 
happened near Leedes in Yorkfhire. 
Honoured Sir , 
T H E Iris Lunaris being fo rarely feen, that the 
Ingenious Dr. Plott tells us (Nat Hitt, of Oxf. 
cap. r. §. 7.) that feveral Learned and Obferving M n 
never faw one in their Lives, and that even Arijiotle 
himfelf obferv’d but two in above 50 Years- the en- 
fuing Account, whf h I had from a Gentleman of great 
Veracity and Ingenuity, will be the more acceptable. 
He is now in this Town, but was lately in Darhyfhire , 
■where, upon Chrijlmas lad, he was at Glapwcll Hall 5 
and walking towards Patterton-Green , about Eight in 
the Evening, he obferv’d with great Sadsfa&ion the 
Bow, which the Moon had fixed in the Clouds : She had 
thenpafs’d her Full about 24 Hours 5* the Evening had 
been 
