T O 
Dr. RICHARD MEAD , 
VICE-PR ESI DENT of the 
ROYAL SOCIETY, 
And FELLOW of the 
Royal College of Phyficians , 
This Thirty-Third Volume of 
Bhilofophical Tranfa&ions 
is Humbly Dedicated 
B Y 
His Moft Obliged, and 
9 
Moft Humble Servant y 
James Jur'in, %S[Stav 
