Part 133

=Eggs=, birds why different colors, 233 silkworm, how imported, 111

=Egyptians=, how ancients wrote, 12

=Electric arc=, temperature of, 35

=Electric current=, what it is, 334

=Electricity=, conductors of, 331 current, 334 good conductors, 331 how discovered, 333 non-conductors, 331 what is, 329

=Electric lighting=, arc-light, 307 Edison’s first lamp (illus.), 306 incandescent carbon lamp (illus.), 306 Mazda lamp (illus.), 306 tantalum lamp (illus.), 306 Tungsten metal lamps, 305 when introduced, 305

=Elements=, carbon, 352 compared with compounds, 349 hydrogen, 349 nitrogen, 350 oxygen, 349 what an is, 349

=Elevator=, description of (illus.), 397 installation (illus.), 396 principal parts of, 396 why does not the car fall? 397

=Emperor=, saved the telephone, 73

=Emperor of Brazil=, receives first message over first telephone, 74

=Engine, gas= (illus.), 181-182 carburetor, 184 cylinder (illus.), 184 horse-power, of, 256

=Exchange=, first telephone, 75

=Exhibition=, of first telephone at Centennial, 74

=Experiments=, with mirror resultant in photograph, 22

=Exploding=, a submarine mine, 34

=Explosions=, how they break windows, 62 in gas engines (illus.), 182 of submarine mines (illus.), 34 what happens in, 205

=Explosives=, definition of, 205 blasting gelatin, 206 gun-cotton, 206 nitroglycerine, 206

=Eye=, of a submarine (illus.), 274

=Eyes=, closed, walking with, 91 hand quicker than, 376 help brain in walking, 91 in some pictures follow you, why, 36 keeping body balanced, 91 nature’s way of protecting, 38 protecting with tears, 38 sparkle when merry, why, 92 why we can’t sleep when open, 92 why we see stars when hit on, 268

=Eye-wash=, tears as an, 38

=Fabrics=, worsted, 85

=Fahrenheit=, what is meant by, 221 why so called, 221

=Fastest= camera in the world, 25

=Fathers and Mothers=, do plants have, 175

=Federal Government=, grazing fee paid to, 82

=Fertilization=, in birds, 179 how corn plant fertilizes, 176 of fishes, 177

=Fight=, of Merrimac and Monitor, 32

=Film=, before and after snapshot, 23 sensitive, 23