[ 20 3 ] 
OBSTACLES 
TO THE 
Improvement of PHYSIC. 
B Y 
JOH. GEORG. BEYERSTEIN. 
Amaen. Acad. vol. iii. 
PREFACE, 
Lthough phylic in its whole extent has 
JL JL received great improvements in this age, 
as moft of its parts have been diligently looked 
into and reformed *, yet its chief ftrength feems 
to confift in accurate knowledge of difeafes, 
and medicines, and when we turn our eyes on 
the prefent times, we find that many fimple 
medicines have been negle&ed ; which fo little 
deferve it, that they rather ought to be re- 
vived; 
