Ɵ HOOKE, ROBERT LECTURES DE POTENTIA RESTITUTIVA OR OF THE SPRING,Explaining the Power of Springing Bodies, To which are added some Collections Viz. A Description of Dr. Pappins Wind-Fountain and Force-Pump. Mr, Young's Observations concerning natural Fountains. Some other Considerations concerning that subject. Captain Sturmy's remarks of a Subterraneo Cave and Cistern. Mr, G.T. Observations made on the Pike of Teneriff, 1674. Some Reflections and Conjectures occasioned thereupon. A Relation of a late Eruption in the Isle of Palma, printed for John Martyn Printer to the Royal Society 'at the Bell in St. Pauls Church Yard' 1678, 56 pages with single fold-out (facsimile) plate after page 24, tooled full calf with gilt titled Morocco panel to spine, 4to.A landmark publication relating to Hooke's observations regarding the spring and its possible application to the balance-wheel regulation. Recent discovery of Hooke's original mancript lecture notes dating to 1670 have confirmed that he was indeed the first to consider the application of a spring to a balance to control its oscillation.