first edition Original printed wrappers.
1886 · Washington DC
by Harkness, W
Washington DC: GPO, 1886. First Edition.. Original printed wrappers.. A very good copy.. Large 4to, 28 pp.
A careful study of the cause of variant readings in star positions because of the 'dynamics' of the instruments. A very interesting paper on the mechanics of instruments with recommendations for their improvement. DSB VI, 119. (Inventory #: 1315)
A careful study of the cause of variant readings in star positions because of the 'dynamics' of the instruments. A very interesting paper on the mechanics of instruments with recommendations for their improvement. DSB VI, 119. (Inventory #: 1315)