27 Aug. 1814

Logic

Ch. │ │ Invention

'.5 Helps to all

11

2

Of the utility derivable from the search after analogies, whether on the same scale or on different scales - and thence whether on different levels or on the same level, three Latin words, viz. Quodlibet cum quolibet, may form another memento.

It is in the instance of the physical department of the field of thought and action, and more particularly to the chemical district of that department, that the applicability of this memento is most conspicuous. Upon every subject try, or at least think of trying every operation: to every subject in the character of a menstruum, apply every subject in the character of a solvent:- and so on.

It is to the extent into which application has been made of this memento that chemical science is indebted for the prodigious strides which within the compass of the present generation has[?] been made in it.

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