Answer to some of the foregoing subjects.�How long the Leyden bottle may be kept charged.�Heated glass rendered permeable by the electric fluid.�Electrical attraction and repulsion.�Reply to other subjects in the preceding paper.�Numerous ways of kindling fire.�Explosion of water.�Knobs and points. 343 Accounts from Carolina (mentioned in the foregoing letter) of the effects of lightning on two of the rods commonly affixed to houses there, for securing them against lightning. 361 Mr. William Maine's account of the effects of the lightning on his rod, dated at Indian Land, in South Carolina, Aug. 28, 1760. 362 On the electricity of the tourmalin. 369 New observation relating to electricity in the atmosphere. 373 Flash of lightning that struck St. Bride's steeple. 374 Best method of securing a powder magazine from lightning. 375 Of lightning, and the methods (now used in America) of securing buildings and persons from its mischievous effects. 377 St. Bride's steeple.�Utility of electrical conductors to Steeples.�Singular kind of glass tube. 382 Experiments, observations, and facts, tending to support the opinion [xiv] of the utility of long pointed rods, for securing buildings from damage by strokes of lightning. 383 On the utility of electrical conductors. 400 On the effects of electricity in paralytic cases. 401 Electrical experiments on amber. 403 On the electricity of the fogs in Ireland. 405 Mode of ascertaining, whether the power, giving a shock to those who touch either the Surinam eel, or the torpedo, be electrical. 408 On the analogy between magnetism and electricity. 410 Concerning the mode of rendering meat tender by electricity. 413 Answer to some queries concerning the choice of glass for the Leyden experiment. 416 Concerning the Leyden bottle. 418 APPENDIX. No. 1. Account of experiments made in electricity at Marly. 420 A more particular account of the same, &c. 422 Letter of Mr. W. Watson, F. R. S. to the Royal Society, concerning the electrical experiments in England upon thunder-clouds. 427 No. 2. Remarks on the Abb� Nollet's Letters to Benjamin Franklin, Esq. of Philadelphia, on electricity. 430 LIST OF THE PLATES PLATE I. Electrical Experiments facing page 182 PLATE II. Electrical Air Thermometer 336 PLATE III. Cavendish Experiment 348 PLATE IV. Lightning Rod Experiments 388 THE COMPLETE WORKS, OF THE LATE DR. BENJAMIN FRANKLIN Now First Collected And Arranged: With Memoirs Of His Early Life, Written By Himself. In Three Volumes. VOL. II. (of III)