Abstract

Researches in Stellar Parallax: <i>Astronomical Observations And Researches Made At Dunsink</i> . Fifth part. Observations in search of stars with an annual parallax. By Robert S. Ball, LL.D., F.R.S., astronomer royal.; <i>Heliometer Determninations of Stellar Parallax in the Southern Hemisphere</i> . By David Gill, LL.D., F.R.S., her Majesty's astronomer at the Cape of Good Hope, and W. L. Elkin, Ph.D.

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