Assertion: newton | /r/CapableOf | exchange few letters
Facets:
value: with flamsteed
type: OTHER
value: about observational data on the planets
type: OTHER
value: during the period of composition
type: TEMPORAL
Source sentences:
text: Newton had also communicated De motu to Flamsteed, and during the period of composition he exchanged a few letters with Flamsteed about observational data on the planets, eventually acknowledging Flamsteed's contributions in the published version of the Principia of 1687.