One sees, and hears, and lives more in a single day in this age of electricity and steam than he did in twelve months sixty years ago. And yet there are those who cry out against modern inventions and modern civilization, and are constantly quoting the days of their grandfathers and great-grandfathers when "life was simple" and there was "time to rest." "Why are we tormented with this thought-stimulating age?" they say. "Why are our emotions called into action by modern music and modern art? Why are we called upon to help the downtrodden and oppressed, and to help to elevate mankind to a higher level? Why cannot we be left alone in peace and quiet, to live in the easiest way?" If this be good philosophy, then the swine, if he were a reasoning being, ought to be ranked among the greatest of philosophers--when he seeks a wallow in the sunshine and sleeps away his useless existence. If he is useful it is because some other being of a higher order uses him to help along his own existence. The man in these days who does not "keep up with the procession" is soon trodden under foot and some other man uses him as a stepping-stone to elevate himself. Yet this is a selfish motive, after all. The world is now rapidly advancing in light, in knowledge, in power to use the infinite gifts that the Creator has hidden in nature; but hidden only to stimulate and reward our seeking. Every man can help in this grand progress,--if not by research and positive thought-power, at least by grateful acceptance and realization of what is gained. _Look forward!_ As Emerson puts it: "To make habitually a new estimate--that is elevation." INDEX. Acetylene gas at Niagara, 230. Alexandria, temple with loadstone, 20. Amber--elektron, 6. Ampere, theory of magnetism, 25. unit of electrical current, 85. galvanometer, 93. Aluminum at Niagara, 223. Arabians, magnetic needle, 21. Arago, germ of electromagnet, 93. Aristotle mentions torpedo, 6. refers to magnet, 20. Atmospheric electricity, Ch. VIII, 77. Atoms and molecules, 39. of substances differ in weight, 42. relations to heat, 42. Aurora Borealis, 35. Bain chemical telegraph register, 101. Barlow on galvanism in telegraphy, 93. Bell, Alexander Graham, radiophone, 171. Bleaching-powder at Niagara, 218. Branly invents the coherer, 179. Cables, submarine. See Submarine Cables. Calcium-carbide at Niagara, 228. Capacity of a circuit, 118, 119. Caustic soda, 221. Chinese, magnetic needle, 21. Chlorine and sodium, 219. Circuit-breaker at Niagara, 199. Closed circuit and current, 122. Coherer (wireless telegraphy), 179. Columbus, compass variations, 22, 34. Condenser in resistance-coil, 118. in Morse relays, 131. Conductors and non-conductors of electricity, 47. relation to electric light, 50. different resistances, 74, 83. Cooke, needle telegraph, 108. Crookes, Prof., X-ray, 121.