( ) 
that is ufed in couching Cataradts, without wounding 
either the Vvea, or the Cryftalline. 
Laflly, Signor Benevolt obferves, that in his Pra- 
d:ice of couching Catarad:s for many Years, having 
generally couched about twelve or fourteen in a 
Year, he had always found, that he work’d upon a 
hard and refilling Subftance, which being tenderly 
touch’d by the Needle, would vibrate and fludluate 
backwards and forwards, and would fometimes return 
againft the Needle with a fenfible Imfetusy which by 
no means agrees with the common Notion of the Ca- 
tarad’s confifting in a Pellicle or membranous Sub- 
ftance. 
FINIS: 
LONDON: Trlnted for W. and J. Innys, 
Printers to the Royal Society, at the Prince’s 
Arms the Weft End of St. Paul’j Churchyard. 
