WorkIsaac Watts

Logick: or, The Right Use of Reason in the Enquiry After Truth

Isaac Watts (1674–1748)

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Journal 1833–1842

p29
“Let us not forget that many things are true which cannot be demonstrated by the rules of Watts's Logick. &c”

Fuller, Margaret. "Journal 1833–1842." Houghton Library, Harvard University; bMS Am 1086 (83); Box 5 (83).

Inferred The text explicitly names 'Watts's Logick' Isaac Watts, Logick: or, The Right Use of Reason in the Enquiry After Truth (London: Clark, Mathews, and Ford, 1724) was the standard logic textbook at Oxford, Cambridge, Harvard, and Yale for over a century.