C 743 ] 
fcopes, with fuch apertures and magnifying powers, 
under limited lengths, as, in the opinion of the bed: 
and undeniable judges, who have experienced them, 
far exceed any thing that has been hitherto pro- 
duced, as reprefenting objects with great diihn&nefs, 
and in their true colours. 
John Dollond. 
XCIX. An Account of fome extraordinary 
Effe&s arifmg from Convulfons \ bemg 
Part of a Letter to John Huxham, M.D . 
and F.R.S. from William Watfon. M.D . 
F.R.S. 
6 June, 1758. 
Read June 15. T N the month of January 1777, I 
JL was concerned for a young gentle- 
woman, who, if the number, continuance, and fre- 
quency of their returns, be confidered, buffered the 
moil violent and fevere convulfions I ever knew. 
At fome times the mufcular fpafms were general ; at 
other times Angle mufcles only, or a number of 
them, fubfervient to fome particular purpofe in the 
animal oeconomy, were affedled. And fuch was 
the peculiarity of this cafe, that after and in pro- 
portion as any Angle mufcle, or any determined 
number of mufcles-, had been in a ftate of fpafm, a- 
paralytic inability lucceeded to thofe mufcles, which 
very much difordered and impaired, and feveral times 
even. for no fmall continuance prevented the patient - 
5 ; from 
