A refracting telescope which has been freed from the effects of chromatic aberration is called achromatic.

"Now constellations, Muse, and signs rehearse; In order let them sparkle in thy verse."—Manilius.

The inconspicuous Lynx furnishes some fine telescopic objects, all grouped near the northwestern corner of the constellation.

... "that region
Where still by night is seen
The Virgin goddess near to bright Boötes."—Poste's Aratus.

"I heard the trailing garments of the night
Sweep through her marble halls,
I saw her sable skirts all fringed with light
From the celestial walls."—H. W. Long

Camelopardalus is a very inconspicuous constellation, yet it furnishes considerable occupation for the telescope.

Nobody who has not seen the moon with a telescope—it need not be a large one—can form a correct and definite idea of what the moon is like.

The narrow sickle of the new moon, hanging above the sunset, is a charming telescopic sight.

"even if the power of our telescopes were increased a hundredfold, and consequently no such systems are known."