| 31. | The observatory is equipped with reflecting telescopes ranging from four inches to 20 inches in diameter.
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| 32. | There he assisted George W . Ritchey who built many of America's first large reflecting telescopes.
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| 33. | A small number of reflecting telescopes designs avoid diffraction spikes by placing the secondary mirror off-axis.
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| 34. | The observatory's main telescope was a reflecting telescope.
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| 35. | A replica of Newton's second reflecting telescope which was presented to the Royal Society in 1672.
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| 36. | Douglass made plans to use the Steward gift to construct a 36-inch diameter Newtonian reflecting telescope.
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| 37. | In 1979 it was replaced with the Anna L . Nickel telescope, a 1-meter reflecting telescope.
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| 38. | The belief that Mars had canals was based on observations Giovanni Schiaparelli made through his reflecting telescope.
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| 39. | The observatory also houses and reflecting telescopes.
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| 40. | The Palomar Observatory, ( 619 ) 742-2119, with its 200-inch reflecting telescope, is open to the public.
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