THE FRENCH LEBEL is of the 1886-1893 pattern, and with bayonet fixed is longer than any other rifle. It weighs, without bayonet, 9 lb. 3-1/2 oz. The tube magazine under the barrel contains eight cartridges; it takes, of course, longer to charge than a magazine loaded with a charger. It does not fire as many shots a minute as some of the other rifles in the field. The position of the magazine is indicated by the crosses. The rifle is sighted from 273 to 2187 yards, and the bullet weighs 198 grains. THE BELGIAN ARMY uses the 1889 pattern Mauser, which weighs just over 8 lb. and is sighted from 547 to 2187 yards. The magazine holds five cartridges carried in clips; not having a cut-off, the rifle cannot be used as a single-loader. It has four grooves in its rifling and measures 4 ft. 2-1/4 in., or, with the bayonet, 4 ft. 11-3/4 in. The bayonet is short and flat. THE "3 LINE" NAGANT of Russia is 1/4 lb. heavier than the British rifle and is over 7 in. longer. The triangular bayonet is always fixed and never removed from the rifle. The magazine of the rifle is of the box type and holds five cartridges. The rifle is capable of discharging twenty-four bullets to the minute. A useful feature is the interrupter, which prevents jamming of two cartridges. THE ITALIAN MANNLICHER-CARCANO is of the 1891 pattern. It weighs, without bayonet, just over 8 lb. 6 oz. and measures 50-3/4 in. The barrel, 30-3/4 in. long, has a four-groove rifling. The box magazine, fixed under receiver without cut-off, holds six cartridges. The magazine holds six rounds, and the rifle is capable of discharging fifteen rounds a minute. INDEX A Accumulators or secondary batteries, 65 Aerial craft experiments, 202 Aerobic and Anaerobic bacteria, 234 Afterdamp, 228 Alcohol as a fuel, 49 Alternating current, 35, 193 Altofts, artificial coal mine at, 139 Aluminium, 133 Amalgam, 117 Ammeters, 25 Ammonia in making ice, 72 Ammunition for big guns, 240 Amperes, 22, 24 Analysis and synthesis, 43 Anode, 55 Anschutz, Dr, 96 Antennæ, 162, 171 Anthracene oil, 48 Arc, the, in wireless, 165 Argon, the gas, 75 Artesian wells, 45 "Atmosphere," a unit of measure, 72 Atoms, 56 "Avogadro's Constant," 33 B Bacteria, beneficent, 234 Ball mill, the, 115 Battery, electrical, 23 Benzine, 45, 48 Bessemer, Sir H., 236 Blowpipe, oxyhydrogen, 120 Board of Trade Unit, the, 22 Boiling water, 10, 76 Bore of a gun, 236 Boulders, blasting, 20 Branly, 166 "Brattice cloth," 224 Breech of a big gun, 240 Brennan torpedo, the, 102 Brewing, 50 "Brine" in machine-made cold, 70 "Budding" of yeast, the, 51 C Calibre of a gun, 236 "Capacity," 153 Capacity and inductance, electrical properties, 161 Carbolic oil, 48 Carbon, 11 Carbonic acid gas, 10 Carburetter, the, 46 Cardiograms, 32 Caselli, 176 Cathode, 55 Cavendish, investigations of, 73