T o   the  L e a r n e d 
 D r .   M   E   A D , 
 Phyfician  to His Majeity. 
 Honoured  SIR, 
 T H E   great  Honour  You  have  been  
 pleafod  to  do  me?  in  not  only  Subscribing  
 to,  but  Encouraging  my  former  
 Works,  emboldens me  now  to  confide  in  
 your worthy Patronage  alio  to  this. 
 And  indeed  I  ihould  not  only  be  guilty  
 o f  the  higheft  Ingratitude  for  thofo  many  
 Favours  I  have  received  from  You,  if  I  
 Ihould not with  all poiiible Reipect prefont  
 this  to You,  but even be forgetful to myfolf, 
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