TY - JOUR T1 - An Extract of Monsieur Hevelius's Letter, Lately Written to the Publisher, Concerning the Famous Kepler's Manuscripts; Together with Some Considerations of His, about the Use of Telescopic Sights in Astronomical Observations: Delivered in the Same Language, Wherein 'Twas Written JF - Philosophical Transactions (1665-1678) VL - 9 SP - 27 EP - 31 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1674.0014 M3 - doi:10.1098/rstl.1674.0014 ER -