ON

THE USE

OF

A NEW MICROMETER

AND

ITS APPLICATION

TO THE DETERMINATION OF THE PARALLAX OF MARS

BY

PROFESSOR Dr. von BOGUSLAWSKI.

k. n. a.

DIRECTOR OF THE ROYAL OBSERVATORY AT BRESLAW; SECRETARY OF THE GEOGRAPHICAL SECTIONOF THE SILESIAN SOCIETY} HONORARY AND CORRESPONDING MEMBER OF THE GEOGRAPHICAL SOCIETYAT BERLIN, OF THE BRITISH ASSOCIATION AND OF THE SCIENTIFIC SOCIETIES OFFRANKFORT, HAMBURGH, JASSY, MARBURG1I ETC.

FROM THE MEMOIRS OF THE ROYAL ASTONOMICAL SOCIETY VOL. XV.

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