Assertion: hale telescope | /r/CapableOf | go to use primary mirror of fused quartz
Facets:
value: originally
type: TEMPORAL
Source sentences:
text: Originally, the Hale Telescope was going to use a primary mirror of fused quartz manufactured by General Electric, but instead the primary mirror was cast in 1934 at Corning Glass Works in New York State using Corning's then new material called Pyrex (borosilicate glass).