IMPLEMENTS, agricultural, 64, 156 Machinery for: boring rock, 373; cutting irregular forms, 208; drilling rock, 272, 300; fret-sawing, 612; magneto-electric, 132; making beet sugar, 393; making soda-water. 404; mortising timber, 31; mowing, 156; planing, 429, 493; sewing, 113, 157, 231, 232, 281, 376, 588; shear- ing, punching, and stretching, 133; smut- Magneto-electric machines, Slater's, 132 McCarthy and Cunningham's improved Measure and funnel combined, 136 Mechanical fingers, 395; mechanical movements, 5, 28, 53, 76, 104, 124, 148, 177, 200, 221, 248, 269, 292, 321, 344, 365, Microscopic accessories, 416, 613; micro- scopic appearance of starches, 493, 612 Microscopical examination of cocon, Millstones, 128, 152. 201, 373 Model engine pump, 157; model steam- Momentum and attraction, 444 Moncrieff's hydro-pneumatic gun-carriage, 564 Motive power, improvements in, 224 Nature, sketching from, 3, 4, 106 232 Nets, fishermen's, 380 Now lathe by George Plant, 421; new Operations of the wood-boring beetle, 176 Optical and spectroscopical, 323, 500, 586 "Otter" for lifeboat service, 233 Oxyhydrogen gas stove, 41 Patent apparatus for cleaning grain, 348; coil, Varley's, 20; compound set, 128; rotary spader. 64 ; starter for sewing-machines, 232; wedge-driving Patterns: cylinder, 260; girder, 259 Perkins's high-pressure engine, 109 Perspective, 332; perspective drawing, 397 Piston pressure, 599; Plan for carrying trains across the Straits Plant, cochineal, 137; Plant's lathe, 421 Polytechnic barometer, Royal, 8 Power-looms, 608; power, motive, 224; power of screw, 592 Practical geometry, squaring the circle Presses: bookbinders' cutting, 65; Gough's Pressure: on columns, 21; on piston, 599; Printing and arming press, 441, 442; printing names on plans, 141, 188 Problems, 19, 44, 70, 141, 188, 477, 597 Pulleys and blocks, 425; pulleys, Kelsey's Pumps: air, 325, 445; model-engine, 157; RAILWAYS: street, 277; system, Hutchinson's, 149: trains across the Readings from the globes, 208, 252, 278, Reeds, harmonium, 382 Rest, slide, 249 Rifles: Chassepot, 517; Soper, 138 Road locomotive, 253 Roberts's galvanic battery, 305; Roberts's Rock-drilling machines, 273, 300, 373 Rotary spader, patent, 64 Rotatory engines, 61, 115 Royal Polytechnic barometer. 8 Ruddick steam-engine, the, 4×9 SACKS, lifting, 140 Safety-valves, 214, 260, 280, 309, 325, 352 Satellites of Uranus, 522 Saturn, 136, 505, 529 Science for the young, 78, 79, 80, 105, 154, 171, 196, 222, 268, 296, 297, 318, 338, 364, Scraper for boilers and tubes, 429 Seek's apparatus for cleaning grain, 348 Shand's steam-pumps and fire-engines, 85 133 Shewan's spiral water-wheel 157 Shiptonian velocipede, the, 253 Sketching from Nature, 3, 4, 106 Slater's magneto-electric machines, 132 Slide-rest, spherical, 249; slide screw- Small slide screw-cutting lathe, 252 Smut and separating machine, 594, 595 Solar calorimeter, 416; solar eclipses, 225 Sources and application of electricity, 26, 27, 75, 195, 196, 265, 388, 531, 580 Space for strings in piano, 352 Specula, 37 Spherical slide rest, 249 Spinning cotton, 112, 133, 183, 204, 230, 231, 284 Squaring the circle, 301, 376, 424 Stand for organ accordion, 546 Starter for sewing machines, 232 Steam boiler-feeding. 204, 301, 369; steam carriage, 304; steam cylinders, 40; steami drills, diamond-pointed, 272; steam engine, 301; steam engine lubri- cator, 157; steam engine, model, 213, engines and pumps, 85: steam joint. 571; steam-power, 46; steam whistle, 43 Stone and brick, drill for, 183 Stoning-cherries, machine for, 252 Storer's direct-acting engines, 108 Stretching, shearing, and punching ma- String and belt, Wampum, 44; string Stripes of the sunbeam, 145, 172, 198, 217 Structure of a country, geological, 271 Sunbeams, stripes of, 145, 172, 193, 217 Sundials: erect declining, 15; declining Sun spot, 397; sun's parallax, 402 Superficies, mensuration of, 502 Telescopic, 85, 204, 472, 527, 586, 602 Theory and application of electricity, 26, 27, 75, 195, 196, 265, 388, 531, 580, Timber, machine for mortising. 31 Tool-holder, 209; tool, improved combina- tion, 176; tool for inclined or level sur- Valves: double-beat Cornish, 356; lead Vehicles, self-propelling, 77 Velocimane, Doirier's, 155 Velocipedes: English," the, 65; four- Water-barometer, 396: water, convexity of, 252; water, distilling, 380; water- heater, feed, 369; water-power, 46; water-pressure, 598; water-weed, Ame- Watson's deep tubular wells, 276 Wedge-driving drums, Kelsey's, 113 What stripes the sunbeam, 145, 172, 193, Wheel-cutting engine, 12; wheel-gauge, Manchester, 328; wheel-gearing, 356; Wheels: elliptical, 397; fairy, 233; ABSTRACT of paper on the sun, 577 Abuses and uses of the ear, 5, 28, 51 Accessories to the microscope, 462 Action of the jaws in drowning, 364; action of magnetism on light, 33 Ancient coins, 169, 197, 218, 314 Animal magnetism, 343; animals, shear- Antiquity of the world, 313, 337, 362, 410, Apparatus: desiccating grains, 4; dis- tilling, 604; optical 606; smutting grain, Application of photography to military purposes, 439; application and theory of electricity, 26, 74, 146, 195, 218, 265, 340, 387, 481, 530, 579 April, astronomical notes for, 34 Art workmanship competition, 319 Astronomical notes, for April, May, June, July, August, and September, 34, 155, 250, 346, 444, 563; Astronomical Society, Royal, 8, 109, 224; astronomical stu- Plane's machine for mortising timber, 31 Blast furnace, regenerative, 244 Blindness, colour, 121, 150, 169, 194 Blowpipe, the ENGLISH MECHANIC, 77 Body and mind, 177, 197, 221, 242, 274, Boiler evaporation, meter for, 490; boiler inspection, 466; boilers: high pressure, Boring insects, 176; boring rock, machine Combustion, phenomena of, 2, 32, 55 Comets and meteors, 313, 362, 434, 482; comets and nebulæ, 272, 295 Common roads, steam on, 442 Condition of the sun, 577 Constructing high electrical resistance, Constructive horology, 418 Country and town microscopical jottings, Cranes, wrought-iron, 443, 536, 583 Cunningham and McCarthy's improve- Cutting glass, 298 Deep coal-mining, 294; deep tubular wells, 275; deep wells, motive power Determination of sulphur in irons, 54 Diamond or bort for millstones, 127, 152, Direct-acting engines, Storer's, 108 Discoveries, recent scientifle, 58, 245, 368 Distilling apparatus, Coffey's, 604 Doirier's improved velocimane, 155 Dressing lead ores, 80; dressing mill- Drilling machine, the Burleigh, 299; EAR, the, its uses and abuses, 5, 28, 51 Earth, the, its figure and motions, 6 Economical purification of coal gas, 394 Electric currents, 603; electric fulgurator, Electrical resistance, high, 466 Electricity, its theory, sources, and appli- cation, 26, 74, 146, 195, 218, 265, 340, 387, 481, 530, 579 Electro-typographic machine, 510 Emigration to Victoria, 315, 345, 389 Enamel, printing on, 538 Engineers, Manchester Institution of, 31 108; duty of, 319; high-pressure, 106; ENGLISH MECHANIC blowpipe, the,_77; ENGLISH MECHANIC lifeboat, 101; ENG- LISH MECHANIC Mutual Improvement Society, Manchester, 220: ENGLISH MECHANIC Society of Arts, Edinburgh, 180, 195, 300; English steam road-roll- Evaporation meter for boilers, 490 Examination papers, Whitworth Scholar- ships, 316; examination of rocks and minerals, microscopical, 580; examina- tion, systematic microscopic, 299 Exhaust steam for heating purposes, 56 Workmen's International, 409, 457 Experimental research in relation to em- FELLOW of the Royal Astronomial So- Astronomical notes, 34, 155, 250, 346, What stripes the sunbeam, 145, 172, Figure and motions of the earth, 6 Filtration, improvement in, 180 Fire-escape, Hawkins's, 153: fireproof apparatus for smutting grain, 343 Flute and its vicissitudes, the, 411, 458, 557, 603 Food analysis, 175, 202, 292; food, gelatine GALVANIC batteries, 297 Gas management, 292; gas manufacture. Halley's comet, 50, 77, 100 Heating with exhaust steam, 56 High electrical resistance, 466; high- pressure boilers, 459; high pressure Hints on microscopes, 274; hints on How to choose a microscope, 418, 531; Hutchinson's new railway system. 148 IMPROVED: combination tool. 175; life Inspecting boilers, 466 Institution of civil engineers, 195; Insti- LATHE and its uses, 248; lathe for Launching a great caisson, 465 Leaf as a worker, the, 391, 509 Leaves, tea, 127 Lieut.-Gen. Hutchinson's railway system, Life, organic, 462, 486; life, progression Liquor-barrels, enamelling, 586 Lockyer, Mr., on the sun, 110, 320 Machine for drilling, the Burleigh, 299; machine, electro typographie, 510; machine for mortising timber, 31; Magnetism, animal, 343; magnetism and Manchester Institution of Engineers, 31: Manufacture of gas, 507; manufacture of Manufacturing sugar from beets, 392 Materials, strength of, 97, 122, 199, 342 May, astronomical notes for, 155 McCarthy and Cunningham's motive- Mechanical movements, 4, 27, 53, 75, 104. 124, 148, 176, 200, 220, 247 269, 291, 321, 344, 365, 392, 417, 440, 464, 488, 535, 584 Meteors and comets, 313, 362, 434, 482 Method of high electrical resistance, 466 Microscopes: choosing, 274, 418, 531, 578; NATURE, sketching from, 3, 166 New: antiseptic, 559; electro-typographic machine, 510; patent "compound set, 128; salt for intense electric currents 603; sphygmoscope, 586 New York pneumatic tunnel, 32 Practical treatise on the harmonium, 25, Press, printing and armning, 441 Printing, carbon, 538; printing on enamel Proceedings of the Royal Astronomical Proctor, Mr. R. A., articles by:- Abstract of a paper by Dr. Zollner on Comets and meteors, 313, 362, 434, Earth, the, its figure and motions, 6 Professor Huxley on the horse, 102; Professor Tyndall on filtered air, 102 Prussia and France, strength of, 509 SAFETY in working coal, 269, 294 Salt, 181: salt for intense electric cur Scenery and geological structure of a Scholarships, the Whitworth, 316 Science for the young, 54, 78, 105, 154, 171, 196, 222, 267, 296, 318, 337, 364, 411, 485, 507, 532, 556, 581; science, proba- Scientifle discoveries, recent, 58, 215, 368 Seck's apparatus for smutting grain, 343 September, astronomical notes for, 563 Shearing animals or skins, 125 Shoeburyness, mitrailleur at, 511 Storer's direct-acting-engines, 108 Story of a piece of granite, 562 Strength of France and Prussia, 509; Structure of a country, geological, 219, Sun, the, 577; sun, Norman Lockyer on the, 110, 320; sunbeam's stripes, 145, 172, 193, 217, 241; sunstroke, theory of, 603 Swarming of bees, 582 System of railways, Hutchinson's, 148 Telescopic work for moonlight evenings, Testing the duty of steam-engines, 319 Timber, machine for mortising, 31 Tools: combination, 175: edge, 275 VALUE of different articles of food, 107; value of gelatine as a food, 586; Velocipedes: the trotting, 76; the true, 31 Vicissitudes of the flute, 411, 458, 557, 603 Victoria, emigration, to, 315, 345, 389 Water and war, 489; water-weed, Ameri- Watson's tubular-wells, 275 Weed, American water, 558 Wells motive power from, 391; wells, What is energy, 366, 390, 415, 510: what Winding watches and clocks, 443 Worker, the leaf as a 391, 509 Working coal, 269, 294; working men's Workmanship, art, 319 Workmen, employment of, 174: Work- Wright's paddle-wheels, 108 ZOLLNER, Dr., on the sun, 577 British gold coin, 520; granite working, Angles and tangents, 303. 551; angles, tri- Aperture and power of telescopes, 14 Apparatus, electro-magnetic, 185 Apparent paradoxes in equations, 88 Appeals: a Cumberland miner's, 307, 326, 350, 593; a workman's, 331, 349 Approximate mode of rectifying the circle, Astronomical, 58, 114, 130, 158, 132, 185, 204, 210, 234, 251, 257, 277, 280, 323, 349, Barton's feed-water heater, 369 Batteries, 570, 587, 591; batteries: Cal- laud's, 328, 347, 377, 522; chemical, 88; galvanic, 225, 494: gauze, 211; iron in, 402, 447, 450, 522; manganese, 38; Roberts's galvanic, 305 Beardsley's dynamics, 112, 163, 225 Bicycle: ninety miles a day by a, 137: riding, 374, 398, 426, 494, 521, 543, 566, Bicycles, 329, 351, 376, 426, 472; bicycles: Big heads and phrenology, 40, 90 Blindness, colour, 232, 234, 254, 258 Blowing glass, 113; blowing organ, 228 Boilers: feeding, 204, 227, 426: Field, the, 522, 543; incrustation of, 62: power of, 590; safety valves of, 352; scraper for, 491; scale in, 230; testing, 282 Bolters, silk, 403 Book-edges, cutting, 349; bookbinders' Boring cylinders, 234, 396; boring insects, Brief hints on cross-breeding plants, 378 Brinsmead's history of the pianoforte, 446, British gold coin, ancient, 520; British Bronchitis, 62 Buckle, turn, 612 Building boats, 616: building organ, 88; Burning glass, 208 CABINET and cottage pianos, im- Callaud's battery, 328, 347, 377, 522 Canada, emigration to, 403 Cape Horn, Good Hope, &c., 373 Caps for reflectors, 257 Carbon monoxide, 256 Carbonic acid, 590; carbonic acid gas, Carriage break, new, 64; carriage, gun, 564; carriage wheels, 495; carriages, Chains, strength of, 163, 186, 207, 254 Chassepot rifle, the, 517, 594 Cheap gas, 354, 370, 400, 420, 448, 498, 512, 569; cheap water barometer, 396 Chemical, 136, 160, 184, 282, 331, 447. 493, 590, 592; chemical battery, 88; chemi- Chlorate, baric, 64; chlorate of barium, Chloride, auric, 588; chloride of gold, Choosing one's belief, 210, 227 Chucks: Bennett's, 41, 114; screw, 159; Circle-sailing, 424; circle, squaring the, Clairvoyance, 225 Clavichord, the, 370 Cleaning windows, 587 Clinton's flute, 425 Clip for holding papers, 284 Clock bell, 330; clock-dial, silvering. 587; 1 Colony, an ENGLISH MECHANIC, 330 colours of Jupiter, 86; colours of stars, Combined funnel and measure, 136; com- bined drill, runner and tap, 111; com- bined punching, shearing, and stretching Comfort for railway travellers, 86 Commerce and trade, 161, 184, 206, 209, Composition of the human body, 449; Condenser, microscopic, 305, 353 Conic sections, 446, 474, 497 Constructing telescopes, 158, 251 Construction of: clavichord, 373; lathes, 448, 474; organs, 112; velocipedes, 210, 374 Consumption, tobacco a preventive of, 591 Contributors and querists, 546, 587 Cooking, Stevens's improvements in, 60 Copper sheathing, 160 Cornwall and Devon, 324 Cosmology, lunar, 423, 519, 545, 610 Cottage and cabinet pianoforte, 41 Cotton-spinning, 111, 133, 136, 162, 182, 204, 230, 254, 283, 302, 330, 350, 403 Craters, lunar, 233, 374, 468, 519 Criticism, unfair, 374, 401, 426, 446 Crystals, soda, 10 Culture, mushrooms, 400; vine, 593 350. 593 Cunningham and McCarthy's improve- ments in motive power, 256, 351 Curious arithmetical problem, 227; curious questions, 378, 518, 540, 592, 610 Curious sentence, 423, 462, 497 Cutting book-edges, 349; cutting irregular Draught in carding engine, 136 Drawing: isometrical, 420: perspective, Drill, rimer, and tap combined, 111; drill Drums, Kelsey's wedge-driving, 113 EARTH, the, its figure and motions, 89, 134, 159, 161, 163, 182, 209, 212, 234, 256, 257, 258, 303; earth, gun, and ball, 450 Education: military, 401; scientific, 570 Elastic boiler and tube scraper. 491 Electric experiments, air pump for, 325; electric light for pictures, 492; electric machines, 14; electric machines, Slater's, 131; electric spark, resistance to, 135 Electrical discoveries, 307; electrical psy- Electro-gilding, 424; electro-magnetic ap- Employment and advertising, 226 Engine lubricators, 156, 185, 212; engine- Engines: carding, 136; rotatory. 61, 114; steam fire, 84; wheel-cutting, 12 ENGLISH MECHANIC: colony, 330, 402; lifeboat, 251; microscopical soclety, 592; mutual improvement societies, 89, 130, 159, 187, 351; society for Bristol, Fairlie's "Little Wonder," 208 Fats and oils, vegetable, 331, 347, 379 Feed-water heater, 301, 329, 369, 610 Feeding boilers, 204, 227, 369, 426 Figure and motions of the earth, 89, 134, Finding position of eccentrics, 400 Fingers, mechanical, 305 Fire engines, steam, 84; fires, Kapper's Flute, the, 309, 373, 402, 426, 449, 469, 475, 593 Flutes: the Boehm, 280, 376; Clinton's, Focal length of concave lens, 307 Fontenelle, the crater, 468, 519 Foot-lathe for turning bungs, 15 Forms, irregular. 208 Forum recreations, Bath, 354 Fossil, coal-measure, 612 Fothergill's self-feathering screw-propel- Four-wheeled velocipedes, 320, 521 "F.R. A.S." and the Nautical Almanac," Fraunhofer's lines, 114 Free-reed organs, 518, 569, 614 GALVANIC bands, 11; galvanic batte- Gas by a new process, 474; gas as a fuel, 16; gas for heating greenhouse, 12; gas mains, tool for, 111; gas stove, oxy- hydrogen, 41; gas: carbonic acid, 614, 615; carburetting, 63; cheap, 354, 370, 400, 420, 448, 498, 542, 569 Gauge-cock, 60; gauge, water, 60 Geography and emigration, 115, 230, 255, Geology, 303, 325; geology of Ireland, Globes, readings from the, 208, 252, 278, 329, 352, 372, 421, 472, 518, 542, 588 Gold: chloride of, 592; coin, ancient, 520; Good: chemical battery, 88; Hope, Cape Granite-working in ancient times, 16 Greenhouse heating, 12, 284 Growing potatoes, 333 Gun accidents, 15; gun, ball, and earth, Hand-planing, machine, 446; handrail Harmonium, the, 186, 206, 226, 234, 398, 451, 514, 518, 569, 614, 615; harmonium keys, 86; harmonium reeds, 41, 90, 471 Hawkins's musical notation, 58, 227 Highest vacuum in air pump, 252, 305 Horizontal windmills, 14, 450, 495 How to keep the clock right, 62, 256; how LL.D.'s and Ph.D's are made, 515, 567; how to make a camera, 396; how to make sun-dials, 14, 62; how to skele- tonise leaves, 566; how to trisect an Human body, the, 449 Hydrofluosilicie acid, 10; hydro-pneu- matie gun-carriage, 564 Illuminated portion of the moon, 11, 63 Implements, agricultural, 64, 156 Improved: air pump, 445; fires, Kapper's Improvement societies, ENGLISH ME- Inclined surfaces, tool for, 401 India-rubber, vulcanising, 546 Indian architecture, ancient, 160 Instruments: ancient musical, 16; good, 15 Insulation of induction coil, 284 Interference rings round the sun, 308 International Exhibition, Workmen's, 130, 162 Ireland, 307, 350; Ireland: geology of, Iron: cell, Slater's, 494; in batteries, 402, Lighting the National Gallery and British Lines, Fraunhofer's, 114; lines in solar Link motion, 301, 352, 355, 378, 425, 471, Literature, criminal, 63 "Little Wonder," the, 208 Locomotive ashbox, 568; locomotive, road, Lunar: activity, 371; cosmology, 423, 519, MACHINES for: cutting irregular "Macclesfield" velocipede, the, 15, 89 Magneto-electric machines, Slater's, 131 Making: bread, 15, 63; camera, 396; cod- Midland districts of Ireland, 257 Millers, questions for, 10, 11, 36, 59, 87 Millstones: balancing, 426; dressing, 227 Miner's appeal, a, 307, 326, 350, 593 Moa or dinornis, the, 212, 226 Moon: illuminated portions of, 11, 68 Mordan's self-centering wire chuck, 544 Motion: link, 301, 352, 355, 378, 425, 47) 519, 541, 589; lunar, 545; motions of th earth, 89, 134, 159, 161, 163, 182, 20 Motive power: electro magnetism as a, Mounting: insects for the microscope, 564; Music, 308, 332, 349, 445, 494 Musical, 445, 494; musical instrument, ancient, 16; musical instruments, 346; musical notation, 58, 227, 496, 544 Mutual improvement societies, ENGLISH National Gallery, lighting, 347 Natural science in military education, 401 "Nautical Almanack," the, and "F.R.A.S." Needham's starter for sewing machines,232 North of Ireland, 350; North Wales, 376 Notation, musical, 58, 227, 496, 545 Nut, lock, 16 OATS, crushed, 64 Object-glasses, 40, 185, 252, 282, 333; ob- Observations, astromomical, 234, 518, 613 Obtaining motive power, 256, 351 Oil cod-liver, 495, 542; oils and fats, Old: cottage and cabinet pianos, 41; files, Opinion on bicycle riding, medical, 374, 398 Optical, 277, 323, 423, 586; "Optical Brick- layer's" telescope, the, 378, 423 Organ, the, 38, 88, 112, 138, 139, 185, 228, 234, 279, 518, 569, 614; organ-blowing, 228; organ-pipes, 110, 160, 330; organs, Perspective, 332; perspective drawing, 397 Petersen's steam lifeboat, 279, 304 "Phantom" veloce, the, 567; "Phantom" wheel, the, 87, 115, 137, 163, 256, 303, 328, 495, 567, 616 Philosophy of the ENGLISH MECHANIC, 517 Phonography, 308, 328, 354, 372, 400, 448, Photographic, 59, 182, 279, 307, 308, 545, Phrenology, 40, 90, 254, 325, 447 Pianoforte, the, 304, 469, 496; pianoforte, history of, 446, 469; pianoforte keys, covering, 86: pianoforte, upright, 398 Pictures: electric light for, 492; inverted, Pipes, organ, 110, 139, 160, 330 Pitman's phonography, 308, 328, 354, 372, Plan for crossing the Straits of Dover, Planet Vulcan, the supposed, 35, 84, 137 Postage stamps, poisonous, 15, 35 Preserving: fruit, 450; musical instru- Press, bookbinders' cutting, 64 Problem, arithmetical, 227; problems, 331 Process of gas-making, new, 474 Propellers: Fothergill's 12; screw, 612, Propelling a vessel by a windmill, 587 Pumps: air, 252, 305, 325, 375, 396, 445, 494; model engine, 157; Shand's steam, 85; Punching and shearing machine, 132 Purification of: chloride of silver, 10; Querists and contributors, 546, 587 Questions: curious, 378, 518, 540, 592, 610; examination, 309; for millers, 10, 11, RAILWAY trains across the Straits of Dover, conveying, 323; railway travel- Railways: Brazilian, 371; street, 277 Rain, artillery and, 448, 495, 545 Readings from the globes, 208, 252, 278, 329, 352, 372, 421, 472, 518, 542, 588 Rectifying the circle, 376, 468, 522, 545 Reed organs, free, 518, 569, 614; reeds, Reflectors, dew caps for, 257; reflectors Relation of power to apertures in tele- Remains, Indian architectural, 160 Remarkable old musical instrument, 16 Resistance to electric spark, 135 Riding bicycles, 374, 398, 426, 494, 521, Rifles: Chassepot, 417, 594; Soper, 138, 256 Rimer, drill, and tap, combined, 111 Rings: round the sun, 308; of Saturn, 449 Road: locomotive, 253; steamer, 37; roads, Rotary engine, 61, 114; spader, 64 Rotation of the earth, 134, 159, 161, 234 SAFETY-VALVE, 279, 325, 352, 448 Saleable upright pianoforte, 398 Saltaire lathe, the, 162, 184, 208 Satellites of Uranus, 522, 540, 591, 610 Saturn 136, 449, 494; Saturn and Jupi- Science natural, in military education, 401; summer, 325; science for the Scraper for boilers, elastic, 491 Screw-cutting lathe, 252; screw chuck, 159; screw-in chuck, 184: screw power, 592, 611; screw propellers, Fother- gill's, 12; screw propelling, 612, 617 Secret code for telegrams, 423 Sentence, curious, 423, 469, 497 Sewing machines, 90, 113, 157, 211, 231, Simultaneous equations, 159, 226, 284, 806 Slater's iron-cell, 494: Slater's magneto- Slide screw-cutting lathe, small, 252; Small drills, tempering, 353; small slide Solar photography, 473; solar spectrum, lines in, 183, 211, 230, 256, 257, 279, 282, Solutions: chemical, 256; standard, 474 South Kensington: examination papers, 590; musical instruments at, 346 Space for strings in the piano, 352 Spark, resistance to electric, 135 Spectrum: analysis, 306, 611; solar, 183, 211, 230, 256, 257, 279, 282, 302, 329, 347, 378 Specula: parabolising, 37, 135; platinised, Speculum: grinding. 62, 284; performance of, 307; testing, 328; working, 611 Spinning-cotton, 111, 133, 136, 162, 182, 204, 230, 254, 283, 302, 330, 350, 403 Spots: on Plato, 518, 613; on the sun, 396 Square bar micrometer, 403; squares, Stamps, poisonous postage, 15, 35 Starch, 185, 395; starch and chicory, 161 Stars: colours of, 256; declination of, 256 Starter for sewing-machines, 232 Startling theory about Jupiter and Saturn, Steam-boat travellers, comfort for, 86; steam-boiler feeding, 204, 369; steam- boilers, scale in, 230; steam-carriages, 304, 329; steam-engine lubricators, 156, 185, 212; steam fire-engines, 84: steam hammers, 326; steam lifeboat, 232, 279, 304; steam pressure, 588; steam pres- sure, unequal, 397, 422; steam propellers for vessels, 255; steam and water, 181 Summer: science, 325; skating, 326 Sun, the, 64, 545; sun-dials, 14, 62; sun- flower, the, 114, 162, 185; sun, fuel, of, 160, 203, 225; sun mean distance of, 38, 86, 228; sun's parallax, 402, 425, 474; sun, rings round the, 308; sun spots, 396 Supposed planet Vulcan, the, 35, 84, 137 Surfaces, inclined and level, 401 Swimming a summer pastime, 426 Tap, rimer, and drill, combined, 111 Telegrams, secret code for, 423 Telescope construction, 204, 251: tele- scopes achromatic, 110: Herschelian, 563; Kitchener's (Dr.). 115; reflecting, Telescopic, 13, 14, 15, 34, 85, 110, 130, 158, Temperature in June and July, '69 and '70, 403, 497 UNEQUAL steam pressure, 397, 422 Unfair criticism, 374, 401, 426, 446 Unknown coal-measure fossil, 612 Uranus, satellites of, 522, 540, 591, 610 Use of the telescope, 251; uses of the Useful tool for level surfaces, 401 VACUUM in air pump, 252, 305 Variations in barometric pressure, 444 Varnish. violin, 14, 39, 62, 227 Vegetable oils and fats, 331, 347, 379 Velocipede construction, 210, 374; veloci- 330, 521; Macclesfield," 15, 89; mo- tive power for, 497; "Phoenix," 426; "Shiptonian," 253; sportsman's, 349; Ventilation: buildings, 306, 332; collieries, Violin bellies, 111; violin varnish, 14, 39, 62, 227 Wall decoration, 473, 497 Water analyses, 187, 234, 253, 282, 353, Wedge-driving drums, Kelsey's, 113 Weights of chemical solutions, 474 What is a manichord, 399; what we owe Wheel-cutting engine, 12; wheel-stones, 282; wheels: carriage, 495; fairy, 233, 258; fly, 301; friction, 446; Phan- tom," 87, 115, 137, 163, 256, 303, 328, 495, 567, 616; Shewan's water, 157; spiral water, 157; suspension, 616; Windmills, 14, 40, 450, 495; windmill for propelling vessels, 587 Wing movements, 282 Wire-chuck, self-centering, 544; wire for Wood for fishing rods, blue mahoe, 111, Wooden organ pipes, 110, 139 Working granite in ancient times, 16; Workman's appeal, a, 331, 349; workmen's tional, 130, 162 YEAST, 15 Yorkshire slab, 185 ZINC plant, 38 |