Assertion: caliper's screw | /r/HasProperty | invented by william gascoigne
Facets:
value: in the 17th century
type: TEMPORAL
value: as an enhancement of the vernier
type: PURPOSE
Source sentences:
text: The first ever micrometric screw was invented by William Gascoigne in the 17th century, as an enhancement of the vernier; it was used in a telescope to measure angular distances between stars and the relative sizes of celestial objects.