Discoveries in Electricity, 115 Electrical Feast on the Schuylkill, 119 Dr. Franklin’s Experiment in Drawing Electricity from the Clouds, 120 Lomond’s Electrical Telegraph, (1787,) 121 Reizen’s Electric Spark Telegraph, (1794,) 121 Dr. Salva’s Electric Spark Telegraph, (1798,) 123 Discovery of Galvanism, (1790,) 123 Discovery of the Decomposition of Water by the Agency of the Galvanic Pile, 125 Samuel Thomas Soemmering’s Voltaic Electric Telegraph, (1809,) 126 Extract from the Journal of the Franklin Institute in relation to the Use of Galvanism for Telegraphic Purposes, (1816,) 128 Ronald’s Electric Telegraph, (1816,) 130 Discovery of Electro Magnetism, (1819,) 132 Extract from a Work on Electro Magnetism, published by Jacob Green, M. D. (1827,) 134 Triboaillet’s Proposition, (1828,) 135 Fechner’s Suggestion, (1829,) 135 Discovery of Magneto Electricity, (1831,) 135 Saxton’s Magneto Electric Machine, 142 Dr. Page’s Magneto Electric Machine, 145 Pole Changer, 149 Morse’s American Electro Magnetic Telegraph, (1832,) 152 Schilling’s Electric Telegraph, (1833,) 155 Gauss and Weber’s Electro Magnetic Telegraph, (1833,) 156 Experiments of Messrs. Taquin & Ettieyhausen, (1836,) 159 Vail’s Electro Magnetic Printing Telegraph, (1837,) 159 Wheatstone’s Electric Needle Telegraph, (1837,) 171 Steinheil’s Electric Telegraph, (1837,) 179 Masson’s Electric Telegraph, (1837,) 182 Davy’s Needle and Lamp Telegraph, (1837,) 182 Alexander’s Electric Telegraph, (1837,) 184 M. Amyot’s Suggestion of an Electric Telegraph, (1838,) 186 Edward Davy’s Electric Telegraph, (1838,) 187 Bain’s Printing Telegraph, (1840,) 199 Wheatstone’s Rotating Disc Telegraph, (1841,) 203 INTRODUCTION.