Letter, from William Molyneux to Edmond Halley, dated at Dublin Concerning the wire in Robert Hooke's level and about applying a pendulum to a watch; discussing Hooke's baroscope; states that objections to Hevelius's work should be sent to him when he is alive rather than dead; thanks for a paper on the doctrine of shooting; sends some wolf's fangs; that Huygens had gone to find the northern passage or to discover longitude - sends questions about latitude, exactness of time at sea and about whether it is possible to manage a 12-foot telescope at sea Read to the Royal Society on 30 June 1686 19 June 1686