DEDICATION. 
noble and immenfe Colledion you have made 
of the moft rare and valuable Curiohties, 
and a Library the moft complete in the Uni- 
verfe, in all the Branches of Natural Hiftory 
and Phyftc, have not only been a Treafure 
to yourfelf, but a common Benefit to Man- 
kind ; your generous Dilpofttion having con- 
ftantly led you to communicate their Ufe to 
whoever at home or abroad was deftrous to 
improve himfelf, or to inform the reft of the 
World. 
As your great Knowledge and Skill in 
your own Profeftion, brought you into the 
higheft and moft extenfive Pracftice for a long 
and uninterrupted Courfe of Years, fo your 
Merit and Reputation could not fail of letting 
you at the Head of thole two learned Bodies, 
you had fo much loved and ferved, the Royal 
College of Phyficians^ and the Royal Society of 
LONDON^ over which you preftded with 
fo much Dignity and Honour. 
Your Favours to the Royal Society in par- 
ticular, have been too many to be here men- 
doned I 
