Description | ' Concerning his booke de Motu Pendulorum, and the Lord Brouncker's demonstration of the Cycloid, as also the circular pendullum, and Slusius his demonstartion of the method of Tangents. '
Note in margin ' This letter is to precede that of p. 164 and the date of it is after the new style : which is to be taken notice of, because that of p. 164 is an answer to this. ' |