"The mind, therefore, in producing the vital and other involuntary motions, does not act as a rational, but as a sentient principle; which, without reasoning upon the matter, is as necessarily determined by an ungrateful sensation or stimulus affecting the organs, to exert its power, in bringing about these motions, as is a balance, while, from mechanical laws, it preponderates to that side where the greatest weight prevails."
An Essay on the Vital and Other Involuntary Motions of Animals
3 entries in ESTC (1751, 1763, 1768).<br>
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Robert Whytt, <u>An Essay on the Vital and Other Involuntary Motions of Animals</u> (Edinburgh: Printed by Hamilton, Balfour, and Neill, 1751). &lt;<a href="http://books.google.com/books?id=eCz7KJ_6XYIC">Link to Google Books</a>&gt;