TY - JOUR T1 - An Inquiry into the Quantity and Direction of the Proper Motion of Arcturus; with Some Remarks on the Diminution of the Obliquity of the Ecliptic: By Thomas Hornsby, M. A. Savilian Professor of Astronomy in the University of Oxford, and F. R. S. JF - Philosophical Transactions (1683-1775) VL - 63 SP - 93 EP - 125 PY - 1773/01/01/ UR - http://dx.doi.org/10.1098/rstl.1773.0014 M3 - doi:10.1098/rstl.1773.0014 AU - Hornsby, T. ER -