Mr Glover on Forms of Induction. 1 35 



ed in the lesser circulation with those that perform the greater. 

 But the adaptation of the valves to their function is the grand 

 proof of the whole theory. Now, the theory of the circulation 

 was proved originally on deer ; and the extensive analogies, 

 which in fact are but covert similarities, traceable throughout 

 the animal kingdom, allow of physiological doctrines being trans- 

 ferred readily from one genus to atiother. Many inductive doc- 

 trines in Chemistry resemble very closely, or rather exactly, the 

 law of the circulation, both in their original frame-work, and in 

 the mode of transference they admit of to other genera appa- 

 rently only analogous but essentially similar. 4, There is 

 another modified form of induction, the most definite of all, 

 which may be described as follows : — Here each law is not con- 

 fined, as in the third species, to a single group of a few facts, 

 nor do any exactly corresponding groups exist, to which the law 

 when framed is applicable. But each law extends throughout 

 the known universe, and although the class of facts to which it 

 applies may, or rather must, be defined, the number of instances 

 is illimitable. Each law, however, can be framed from the ex- 

 amination of a few prerogative cases. And as in this kind of 

 inductive generalization, the laws themselves form again parts 

 of a mightier whole, which is framed from them in much the 

 same manner as they themselves from their facts, at length an 

 axiomatic expression is reached, which, arrived at from the inves- 

 tigation of a very small number of instances comparatively, yet 

 includes in its expression an immense array. Illustrative ex- 

 amples exist in Dr Well's theory of dew, and the laws of gravity. 

 We are aware, that all those different forms of inductive proce- 

 dure agree in kind, except, perhaps, the one particularised as 

 practised in medical science; and also, that the divisions be- 

 tween them, however carefully drawn, are exceedingly nice, 

 and perhaps such as, by a close analysis, might be found to 

 disappear. Indeed, the mind gains all its inductive knowledge 

 by one process viewed in connexion with its own functions, 

 and that is by complete proof; the various steps of which we 

 have endeavoured to relate as fully as the vast extent of the 

 subject would permit within moderate limits. Complete enu- 

 meration of all the instances composing a law, is that degree 



