11 
PREFACE. 
t John Bukver (whofe Book 1 had never heard of, 
till my intire Trcatifc, except the Lift of Authors, 
and this Preface, was printed off) makes an Attempt 
to explain this Subject, as the Title of his Book fets 
forth; but it is fill'd with many extravagant Notions 
from different Authors, and is fo far from afeertain- 
ing the peculiar Office of any one Mufcle of the 
Face, that he thinks they all act one againft another 
to form Laughter; and calls in Blood and Spirits to 
fill the Face, in the fame manner that the Membrum 
virile is fill’d; with many other fuch Fancies thro' 
the Whole, which our Room here will not admit us 
to animadvert. But I Jiave reje&ed every other 
Method made ufe of before ; and in the Progrefs 
added fome new Obfervations to the Defcription o„f 
the Mufcles, which are the true Agents of every Paf- 
fion of the Mind, as the Bafts upon which cur 
Dodrine is founded ; wherein, if I have not fuc- 
ceeded as perfc&ly as I could wifh, 1 hope it will, at 
leaft, be allowed the only true Scheme for under- 
(landing that Arr. 
III. 
I have endeavour'd to make thefe Le&ures as en- 
tertaining as I could, and as inftru&ive; whereby 
any one, verfed in the Art of designing, may be 
able to reprefent the Paflions of the Mind upon the 
Face, by dint of his ICnowlege of the mufcular 
Structure : And as the Number of Reprefentations is 
but fmall, which ferves for their Expreflion, there 
was no need of multiplying them to a Repetition of 
Dcfigns that muft make Confufion. Had a certain 
great 
