Sentence Examples

  • In recent years no noteworthy refractors have been mounted on Great this plan; but type A has been chosen by Grubb for the Me!- great Melbourne reflector, of 48-in.
  • 13, is described in detail by Struve (Beschreibung des auf der Sternwarte zu Dorpat befindlichen grossen Refractors von RIH? ?
  • Both the Dorpat and the Pulkovo refractors are defective in rigidity, especially in right ascension.

How would you define refractors? Add your definition here.

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