C 5°3 ] 
extrad this Subftance, and broke fome Part of it off, 
but was forced to dilate the Re£tum> and fo extract 
it that Way. It was a hard unequal ragged flinty 
Stone, l fee the Figure of it in Tab. IV. at F.] was 
Ten Inches and an half round, and weighed Eight 
Ounces and an half, after it was extracted. The Wo- 
man has been eafy from that Moment ; the Wounds, 
by the Care and Skill of her Chirurgions, are healed; 
fhe goes about her Bufinefs, has got a good deal of 
Flefh, and is recovered perfectly, except a Numbnefs 
and Contraction fhe has in fome of her Fingers of 
both Hands, and both Feet and Toes. 
IX. An Account of Mr. Leeuwenhoek’s Mi- 
crofcopes 5 ly Mr. Henry Baker, F. R, S. 
H Aving been favoured by this Illuftrious So- 
ciety with an Opportunity of examining 
the much-talked-of Microfcopes of the famous Mr. 
Leeuwenhoek , who, by his Glaffes, made fuch won- 
derful Difcoveries in the Minutiae of Nature, as have 
laid the Foundation of a Philofophy unknown to 
preceding Ages ; I think it incumbent on me to fhew 
the Ufe I have been making of them. 
Upon opening the Cabinet that contains thefe 
Microfcopes, I laid before me an Account of them, 
drawn up, and prefented to this Society, fome 
Years ago, by its prefent worthy Vice-Prefident 
Mackarnefs . 
Martin 
