OCR Text |
Show Principe? Observatories The principal observatories in the world are: Naval observatory, Washington, D. C. ; Royal observatory, observa-tory, Greenwich, England ; Paris observatory, ob-servatory, Paris, France; Berlin observatory, ob-servatory, Berlin, Germany j Pulko-va Pulko-va observatory, Poland ; Harvard College observatory, Cambridge, Mass. ; Lick observatory. Mount Hamilton, Calif.-; Yerkes observatory, observa-tory, Williams Say, Wis.; Mount Wilson observatory, Mount Wilson, Calif.; Potsdam observatory, Pots dam, Germany. |