Assertion: encyclopedia's article | /r/HasProperty | 261 pages long
Facets:
value: in the 3rd
type: TEMPORAL
Source sentences:
text: The article "Chemistry," which was 261 pages long in the 3rd, written by James Tytler, and had been re-written in that edition's supplement as a 191-page treatise by Thomas Thomson, appears in the 4th edition as an entirely new 358-page article, which, according to the preface to the 5th edition, was authored by Millar himself.