76 SKETCH OF THE LIFE AND CHARACTER 
him—were, doubtless, among the causes of the 
intellectual excellencies for which he was distin- 
guished ; while the simplicity and temperance of 
his private life, and the tranquillizing influence of 
his deep devotional spirit, furnish another instance 
of the connexion which it is always so pleasing 
to trace, between mental vigour and moral purity. 
The exact and discriminating observation of mi- 
nute appearances, which the pursuits of his early 
life had led him to cultivate, proved of singular 
advantage, when his mind was directed to the 
wider views of geology ; for the sound maxim of 
Dr. Samuel Clarke is as applicable to the study 
of nature as to that of philology,—‘‘ex judicii con- 
suetudine in rebus mznutis adhibita, pendet sapis- 
sime etiam in maximis vera atque accurata 
scieutia.” 
Of the two grand and fundamental types of 
intellect, to one or other of which Bacon,* in his 
* Maximum et velut radicale discrimen ingeniorum, quoad 
philosophiam et scientias, illud est; quod alia ingenia sint 
fortiora et aptiora ad notandas rerum differentias ; alia ad 
notandas rerum similitudines. Ingenia enim constantia et 
acuta figere contemplationes, et morari, et heerere, in omni 
subtilitate differentiarum possunt: Ingenia autem sublimia et 
discursiva, etiam tenuissimas et catholicas rerum similitudines 
et agnoscunt et componunt: Utrumque autem ingenium facile 
