THE Yerkes Observatory, which has recently been completed and inaugurated, contains in its instrumental equipment the largest refractor in the world, the diameter of the object-glass spanning 40 ...

Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.

Refracting telescopes dominated the nineteenth ... This opened the way for the great reflecting telescopes of the twentieth century — epitomized by the 200-inch Hale on Mount Palomar and by ...

The original instrument to occupy the 25-foot diameter dome was the 10.5-inch Bausch refracting telescope (f/15.5) installed in the brand new observatory in 1953. Bausch & Lomb Company gave the ...

Refracting telescopes use lenses - combining at least two, and as many as four, pieces of glass - as their objective (the primary light-gathering device). Reflecting telescopes use mirrors to ...

FitzRandolph Observatory is located on the campus of Princeton University in Princeton, New Jersey. FitzRandolph Observatory was constructed in 1934 to replace the Halsted Observatory. In 1966, a 36" ...