72 THE ORIGIN OF SPECIES T 
he endeavours to prove that species may be- 
originated by selection ; secondly, he attempts to 
} show that natural causes are competent to exert 
selection ; and thirdly, he tries to prove that the 
I eneet remarkable and apparently anomalous 
phenomena exhibited by the distribution, 
development, and mutual relations of species, 
can be shown to be deducible from the general 
doctrine of their origin, which he propounds, 
combined with the known facts of geological 
change ; and that, even if all these phenomena 
are not at present explicable by it, none are 
| necessarily inconsistent with it. 
inquiry which Mr. Darwin has adopted is not ‘a 
rigorously in accordance with the canons of 
scientific logic, but that it is the only adequate 
method. Critios exclusively trained in classics or 
in mathematics, who have never determined a 
scientific fact in their lives by induction from 
experiment or observation, prate learnedly about 
Mr. Darwin’s method, which is -not_inductive ” 
enough, not Baconian_ enough, forsooth, for them. 7 
“But even if practical acquaintance with the process 
of scientific investigation is denied them, they may — 
learn, by the perinel of Mr. Mill's admirable — 
chapter “On the Deductive Method,” that there — 
q || \are multitudes of scientific inquiries in. which the 
‘method _of pure | induction helps the investi ator 
but a very little way. 
| 
e 
‘ 
