"Had the King of Spain imploy'd the Hands of his People, and his Spanish Iron so, he had brought to Light but little of that Treasure, that lay so long hid in the dark Entrails of America. And I am apt to think, that he who shall employ all the force of his Reason only in brandishing of Syllogisms, will discover very little of that Mass of Knowledge, which lies yet concealed in the secret recesses of Nature; and which I am apt to think, native rustick Reason (as it formerly has done) is likelier to open a way to, and add to the common stock of Mankind, rather than any scholastick Proceeding by the strict Rules of Mode and Figure."
— Locke, John (1632-1704)
(IV.xvii.6, p. 343)
I find over 25 entries in the ESTC (1690, 1694, 1695, 1700, 1706, 1710, 1715, 1721, 1726, 1731, 1735, 1741, 1748, 1753, 1759, 1760, 1765, 1768, 1775, 1777, 1786, 1788, 1793, 1795, 1796, 1798). See also the many abridgements issued in the period.
First published as An Essay Concerning Humane Understanding. In Four Books. (London: Printed by Eliz. Holt, for Thomas Basset, at the George in Fleetstreet, near St. Dunstan's Church, 1690). <Link to EEBO><EEBO-TCP>
Searching first in a Past Masters edition based on the 12th Edition of Locke's Works and proofread against the 1959 Fraser edition. More recent searches in EEBO-TCP.
Reading John Locke's An Essay Concerning Human Understanding, ed. Peter Nidditch (Oxford, Oxford UP, 1975)--against which I have checked the text searched in Past Masters. Note, Nidditch's text is based on 4th ed. of 1700.