Assertion: gauss | /r/CapableOf | invent the heliotrope
Facets:
value: in 1821
type: TEMPORAL
Source sentences:
text: To aid the survey, Gauss invented the heliotrope, an instrument that uses a mirror to reflect sunlight over great distances, to measure positions.
text: Gauss invented the heliotrope in 1821.
text: According to Britannica, Gauss also surveyed the territory of Hanover, invented “the heliotrope (an instrument that reflects the Sun’s rays in a focused beam that can be observed from several miles away,” published works on number theory, the mathematical theory of map construction, and many other subjects.