131 
principles of -science in the expression of 
individual character, and of a soul and figure 
specifically and completely appropriated to each 
other, which opened the way to the greatness 
acquired by those who followed him in his 
studies. In that point of excellence, Leonardo 
da Vinci was original; and it was the natural 
result of a mind like his, 
f'o1'med_to philosophical 
investigation, and deeply attentive "to all the 
variety of appearances by which the passions are 
marked in the human countenance and frame. 
These 
he 
traced. 
to 
their 
sources : 
he 
found. 
them 
in 
their 
radical 
principles, 
and 
by 
his 
knowledge of these principles, 
expression 
his 
of 
character became perfected. 
had 1104; 
Massaccio 
"V The nature exhibited by 
gone to that extent of expression. It however 
spoke at soul; hedrew forth an inward mind on 
the outward countenance: he gave a cl1aracte1'; 
but that character, was not so discrinninated as 
to become the index of one particular passion 
more than another; or to decide, for instance, 
Minerva : 
3 
the head of Jupiter fromthat of 
S0