TY - JOUR T1 - An Answer of Dr. Wallis to Mr. Hobbes's Rosetum Geometricum in a Letter to a Friend in London, Dated July 16. 1671 JF - Philosophical Transactions (1665-1678) VL - 6 SP - 2202 EP - 2209 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1671.0029 M3 - doi:10.1098/rstl.1671.0029 AU - Wallis, J. ER -