ENGLISH MECHANIC AND WORLD OF SCIENCE. WITH WHICH ARE INCORPORATED THE MECHANIC," "SCIENTIFIC OPINION," AND "THE BRITISH & FOREIGN MECHANIC." INDEX TO VOL. XLIX. ENGLISH MECHANIC. ABNORMAL appearance of a star, 349 | Antiquities, 512 Accident: Harecastle, 155 to royal train, 486 Accidents: balloon, 460 locos. in railway, 441, 527 forming, 37, 99, 118, 120 Accumulators to drive half-horse motor, Bacteriology, economic value of, 298 Antiseptics, comparative value of chemi- Bad language, using, 367 Aperture, telescopic, 324 Baits, preserving dead, 227 Apertures: efficacy of large, in micro- Baking powder, alum in, 265 scopy, 416, 437, 488 power of, 282 Apochromatic: eidolic dots, 315 focal planes, 209 quarter, Zeiss's, 507 results, 21, 123 test, new, 156 Apparatus: for use in drying combustion Mix and Genest's intercalating, 23 to illustrate the influence of pressure on Approximate of equal star distances, pro- Apsides of the earth's orbit, 453 compressed, 60, 98, 118, 158, 264, 435, 443 Aquarium cement, 278 -on French tramways, 512 purification of, by ozone, 320 Air-bath for laboratory use, 343 Air-gun; 510 Air-pump: 223, 227, 266 and blowpipe, glass, 202 Air-vessel, 161 Alarm clock, electric, 463 guns, 443 Alarum: sensitive sound, 487 Aquatic beetles, 87 Arbor, true, and cutters, 46 Arc: and incandescent lighting, dynamo lamp, simple, automatic, 113 Area of spherical zone, 453, 464, 486 • Areas of a 25in. o.g. and of the pupil of Arithmetic compound, why needed, 75 problem in, 381 Arithmometer calculating machine, 159 - proposed international standards to Aurora: corona and, 218, 236 control the, 67 Andromeda, Gamma? in, 108, electrically recording, 374 Angle of lathe tools, 225 Balance, new, 319 Balloon: 161 accidents, 460 Ballooning, 53 Ball's division on Saturn's ring, 280 Bars, bending of fire, 97 Bath: enamel paint, 461 heater, Fletcher's, 78, 96, 181 heating swimming, 444 portable vapour, 77, 116, 247, 265, 361 which is the best, 78 Batteries: bichromate, for electric light- Bicycle: cement for, 531 g, 125, 394, 398 for small installations, 157, 398 for arc lighting, 311 for heating wires, 311 for medical purposes, constant current, gas, 13, 32, 56, 74, 177 secondary, 420 - some results with in train lighting, 543 street galvanic, 311 uses of, 350 Battery: 16, 139, 225, 261, 420, 528 bichromate, 36, 160, 355, 394, 398, 412 cells, composition, 14 charging medical, 78 chromic acid, 331, 352, 487, 507 cleaning, 310 current of a, 59 ferric chloride, 420 for electric light, 419, 550 Gessner's dry, 78 granule, 36, 58 Holtzer cylinder, 192 medical, 139, 157, 160, 199. portable, 459 six-cell in one trough, 487 Weir's new, 32,56 Bayer and Flamsteed, 55, 70 plastic metal, 550 lager, 487, 530, 551 Bees, stings of, 155, 198 chain, cleaning, 97 chains, 223 cranks, 95, 137 dynamo and accumulator for, 17, 58, 11 gear for, 6 head, 202 hub, steel, 16 lever, 331 pedals, rat-trap, 420 repairing, 245 saddle, 34 speed, 119 spokes, 376, 396 Bicycles, safety, 305, 330 Bills, mill, 549 Binary star, mass of a. 194, 222, 236, 263 Biology, elementary, 37 Birds that destroy insects, 365 Black for sheet zinc, 224 needles, 443, 506, 550 pepper, 286 snow, 174 Blacksmithing, practical details of, 127, 320, 384, 542 Blast: sand, 374 steam suction and still, 408 Blood, is the stain human? 393, 415 Blower, water, 76, 187, 239 Blowpipe: analysis, 17, 438, 460 and air pump, 202 for brazing, 286 furnaces, 116 gas, 151, 200 Sprengel's, 187 |