By what successive changes, our words in general, and especially the minor parts of speech, have become what we now find them, and what is their original and proper signification according to their derivation, the etymologist may often show to our entire satisfaction.

Every word must have had its particular origin and history; and he who in such things can explain with certainty what is not commonly known, may do some service to science.

But even here the utility of his curious inquiries may be overrated; and whenever, for the sake of some favourite theory, he ventures into the regions of conjecture, or allows himself to be seduced from the path of practical instruction, his errors are obstinate, and his guidance is peculiarly deceptive.

Men fond of such speculations, and able to support them with some show of learning, have done more to unsettle the science of grammar, and to divert ingenious teachers from the best methods of instruction, than all other visionaries put together.

Etymological inquiries are important, and I do not mean to censure or discourage them, merely as such; but the folly of supposing that in our language words must needs be of the same class, or part of speech, as that to which they may be traced in an other, deserves to be rebuked.