Assertion: newtonian telescope's design | /r/CapableOf | use parabolic mirror
Facets:
value: like a newtonian
type: MANNER
value: at one end of the tube
type: LOCATION
Source sentences:
text: Like a Newtonian, this design uses a parabolic mirror at one end of the tube.
text: In 1722, John Hadley developed a design that used parabolic mirrors, and there were various improvements in mirror-making.