TY - JOUR T1 - Observations on the Satellites of Jupiter and Saturn, Made with the Same Telescope. By John Hadley, Esq; F. R. S. Extracted from the Minutes of the Royal Society, Apr. 6. 1721 JF - Philosophical Transactions (1683-1775) VL - 32 SP - 385 EP - 386 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1722.0073 M3 - doi:10.1098/rstl.1722.0073 AU - Hadley, J. ER -