Copyright
Richard Green Parker.

A school compendium of natural and experimental philosophy : embracing the elementary principles of mechanics, hydrostatics, hydraulics, pneumatics, acoustics, pyronomics, optics, electricity, galvanism, magnetism, electro-magnetism, magneto-electricity, astronomy : containing also a description of online

. (page 38 of 38)
Online LibraryRichard Green ParkerA school compendium of natural and experimental philosophy : embracing the elementary principles of mechanics, hydrostatics, hydraulics, pneumatics, acoustics, pyronomics, optics, electricity, galvanism, magnetism, electro-magnetism, magneto-electricity, astronomy : containing also a description of → online text (page 38 of 38)
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Meteoric stones, J*-. Brewster's

opinion of 367

Metes 339

Mica 21

Microscope, a double 24S

" a single 242

Microscope, compound nrp^nify-

ing power of, how ascertained 244
Microscope, magnifying power of,

how ascertained 244

Microscope, the solar 244

Microscope, the solar, 3it,guify'ug

power of 241

Microscopes, what hjvve ti^

greatest magnifying powr . 2-1 r ,
Milk, why aiusctjd by
and lightufcg .



458



INDEX.



Milky-way . 383 I

Minor thirl 134

Mirror 221 j

" concave 222 j

" convex 222 ;

" plain 221

Mirrors of half the he ght show a
whole-length figure . . . .2171

Mirrors reverse all images . . 222
" use of glass in . . . . 221

Miscellaneous Ciperiments with
air 166 i

Mobility 27 j

Molybdenum 20 !

Momenta 50 j

Momentum 41,50!

Momentum of a body, how ascer-
tained 50 ;

Monochord 182

Moon . 386

" as cause of tides 391

" as seen through a telesoope 389

Moon, common errors in respect
to the 386

Mooa, density of the 387

" di Here nee in daily rising 389

" gibbous 388

" harvest and hunter's . . 389

" horned 388

" in quadrature 388

Moon-light, objects seen by, why
faint 217 I

Moon, surface of the 386 i

" uninhabitable 3(i4 |

Morienne 144 j

Morse's telegraph 320!

" telegraphic alphabet . . 323 |

Motion 41

Motion, accelerated, retarded and
uniform 44

Motion, axis of 59

" centre of 59

Motion, how transmitted by hy-
drostatic pressure 121

Motion, incident and reflected . 47

Motion impelled by two or more
forces 55

Motion of the heavenly bodies,
cause of the 34

Motion, perpetual 45, 407

" regulators of 100

" reversed 83

Motion, slow or rapid proluced at
pleasure by machinery .... 84

Motion, when imperceptible . . 220

Moving p< wer in machines, how
stopped . 8fi



Mountain, how burst by hydro-
static pressure 12$

Musical scale 183

" sounds 181

Multiplier, electro-magnetic . .313

Multiplying-glass 235

Musical chord, how produced . . 182
Musical instruments, why affected

by the weather 182

Macic of a choir dependent on the

uniform velocity of sound . .176
Music of strings, how caused . . 181
Mutual attraction . . 34



N.

Natural Philosophy, definition of 17

Neap tides 391

Needle, the magnetic 304

Needle, how placed in a mariner's

compass 305

Negative electricity .... 259, 202
" (galvanic) pole ... 287

Neptune 371

Newcomen and Savary's steaiu-

engine 197

Newton, Sir Isaac .... 23, 337
Newton, Sir Isaac, discovery of -

gravitation 100

Newton's discoveries, on what

based 352

Newton's (Sir Isaac) opinion of

light 211

Newton, Sir Isaac's, opinion of the

earth's compressibility ... 29

Nickel 20, 298

Niobium 20

Nitrogen 20

Non-conductors . . . 15?, 2l)fl

Non-electrics 258, 260

Nut and screw . 95



Oars, on what principle construct

ed . .71

Object, apparent size of, on what

dependent 220

Objects, when invisible . 218, 220
Octave 184

" how produced 182

CErsted's discoveries In electro

magnetism 108

Oil, effects of in smoothing the

surface of water ^31

Oil, glutinous matter in . . Ill
Ji'-ujillB . US



INDEX.



459



Oil, why it fiVata 39

Giber's, Dr., opinion on lunacy . 386

Opaque bodies 217

Opera-glasses 249

Opposition 350

Optical paradox 212

Optis-nerve 237, 240

Optics 17, 210

" definitiun uf 18

Oracles of Delphi, Ephesus, Ac. . 180

Orbit, meaning of . 340

Orbits of the planets, inclination

of 347

Orbits of the planets, not circular 343

Otto Guericke 158

" Out of beat," meaning of . . .104

Ovorshot-wheel 82

Osmium .... 20

Oxyde of iron . . 21

Oxygen 20



Pails, why two can be carried
more easily than one .... 69

Palladium 20

Pallas 339

Parabola 62, 341

Parachute 38

Paradox 118

acoustic 177

hydrostatic 118

mechanical 68

optical 212

pneumatic 169

Paradox, optical, pneumatic, acous-
tic, Ac., no paradox . . 212 note

Parallax 385

Parallel motion, appendages for 200

Parallelogram 48

Parthenope 839

Pascal 144

Pelupium 20

Pendulum 100

Pendulum, cause of slowness and

rapidity of vibrations . . . .102
Pendulums, continuous motion

of, how preserved 103

Pendulum, how lengthened or

shortened 102

Pendulum, how to be suspended 10:i
" its motion, how caused 101

Pendulums, length of, proportion

of 103

Pondulu'Ji, length of to vibrate
seconds 102



Pendulum, length of to ei orate

two seconds 103

Pendulum, length of varies with

the latitude 102

Pendulums, table of the lengths
of to beat seconds in different

latitudes 104

Pendulum, the ballistic . . . . 6J
" the gridiron .... 10U

" the mercurial .... 103

Pendulums, to what variations

subject 103

Pendulum, use of the ball of. 101 note

Penumbra 394

Percussion, force of 93

Perigee 349

Perihelion 349

Permanent magnets 301

Perpendicular 48

Perpetual lever .80

". motion 45

Perpetual motion, approximation

to 288

Phocea 339

Phosphor 363

Phosphorus 20

Photography 257

Physical spectra 228

Physics, definition of 17

Piazzi . 343

Pincers 75

Pinions 83

Pipes, tones of, on what dependent 181

Pivots 8]

Plane, the inclined 90

Planet, meaning of 339

Planet and star, difference be-
tween 339

Planets, characters by which they

are represented 34fi

Planets, inferior and superior . . 343

" minor 339, 367

" " how discovered . 342
Planets, minor, by whom discov-
ered 343

Planets, minor, size of 344

" names of the ... 338, 339
Planets, relative appearance of,
as seen through a telescope . 372

Planets, the primary 338

Planets, when in a particular con-
stellation 349

Platinum 20

Platinum, both ductile and malle-
able 31,32

Plough, constellation of the ", 398
Pluuib-lu-e 3"



460



INDEX.



Pneumatics 17 18, 138

Pneumatic balloon 1(51

Pneumatic paradox 169

" shower-bath .... 166

" scales 160

Pointers 3H8

Poker 75

Polarity 299

boreal and austral . . ,. 302

Polarization of light 256

Polar or pole star 384,398

Poles, magnetic 300,304

Poles, magnetic, where strongest 304

Ponderable agents 18

Pope Callixtus and the comet of

Halley 378

Pores 28

Porosity 27, 28

Positive electricity .... 259, 262
Positive (galvanic) polo .... 287

Potash 21

Potassium 20

Power 72, 405

Power, how gained by use of the

lever 76

Power, how to be understood 73, 405

Powers, mechanical 70, 72

Power that acts 7

Power, weight and velocity, pro-
portion of 90

Precession of the equinoxes . . 397
Press, Bramah's hydrostatic 121, 415
Presses, screws applied to ... 95
Pressure at any depth, how esti-
mated 115

Pressure, fluid, law of 115

Pressure, hydrostatic, as a me-
chanical power 121

Pressure, hydrostatic, caused by
height, not by quantity . . . 119

Pressure of fluids 114

Pressure of fluids in proportion to

height of column 129

Pressure of the air .... 141, 162
" of water at great depths 109
Pressure on hydrostatic bellows,

how estimated 119

Primary planets 338

Principle of all machines ... 72
Principle of the mechanical pow-
ers 71

Prism 252

Projectiles 62

Projectile, random of 65

Projection, force of 62

Projection, force of, has 10 effect
on gravity . 64



Propeller ...... 204

Properties, essential aud acciden-
tal, of matter ........ 21

Properties, essential and unesssu-
tial ............ 23

Prussian blue ...... 3 '27

Psyche ......... 539

Ptolemy .......... .536

Pulley ........... 8C

" fixed and movable ... 86
" fixed, use of ...... 87

Pulleys, mechanical principle of
same as that of levers .... 88

Pulley, movable, how it differs
from a fixed ........ 87

Pulley, movable, principle of the 89
Pulley, power of, how ascertained 88
Pulleys, practical use of .... 89

Pump, the chain ....... 131

" the common, for water . .152
the forcing ...... 153

l the air ........ 154

Pupil .......... 237, 238

Pyramid, why the firmest of struc-
tures ........... 68

Pyrometer .......... 193

" Wedgewood's ... 193
Pyronomics .... 17, 18, 185, 187

Pythagoras ....... 336



Q.



. .388



Quadrature. . ...

Quartz ..... ....... ^1

Questions for solution 36, 42, 43, 50

53, 54, 78, 86, 90, 96, 106, 116, 127,

184



U.



Radiation of heat 190

Radii 48

Radius 48

" vector 350

Rain, how formed . . . 121,150, 186
Rainbow, how produced .... 255
Ram, the battering 105

" the hydraulic 133

Random of a projectile ... 65

Rarefaction . .- 140

Rarefied 140

Rarity ......... . 27, 28

Ray of light 21 1

Rays of light absorbed . . . . 215

" " converging . . . 212
Rays, converging and diverging,

laws of , . 22"



INDEX



461



Rays of light, diverging . . . ^i2
Rays of light from terrestrial ob-
jects . , 213

Reader, The Rhetorical .... 180
Reaumur's thermometer . . . 149

Receiver 154

Rectangle 48

Rectilinear motion converted to

circular 81

Reflected motion 47

Reflecting substances ..... 211
" telescope . . 246, 249, 444

Refraction 229

Refracting substances 211

" telescope . . . 246, 443

Refrangibility 230

Registering apparatus of the tel-
egraph 322

Regulators of motion 100

Rein, F. C., hearing trumpets or

cornets 178 note

Repulsion f . . . . 28

Resinous electricity 262

Resistance 41

Resistance of a medium, to what

proportioned 97

Resistance of the air 38

" to be overcome ... 71

Resultant 58

" motion 57

" of two forces .... 56
Resultant of two forces, how de-
scribed 58

Retarded motion of bodies pro-
jected upwards 54

Retina ... 237, 240

Reversed motion 83

Revolving-jet 163

Revolution of the planets, length

of 341

Rhetorical Reader ....... 180

Rhodium 20

Rhodes, siege of 105

Rifles, how tested 63

Rivers, how formed 124

Rivers, why difficult to swim in . 126
Rivulets, how formed . . . 124, 136
Roads, inclined planes .... 91

Rolling friction 98

Romans, the ancient, how they
conveyed water ...... 137

Rope-dancer, how enabled to per-
form his feats 67

Ropes, strength of, on what de-
pendent 100

Rosse's telescope 251,444

Rotation, electro-magnetic . . 313



Rudders, on what principle con-
structed 77

Rules relating to musical strings 184
Rules by which changes of' the
weather may be prognosticated
by means of the barometer . . 147
Rules relating to musical pipes . 184
Rush's Treatise on the Voice . . 180
Ruthenium 20

S.

Safety-valve 199

Sagacity of animals 92

Sap, ascent of, to what due .112
Satellites, general law of .... 370

Saturn 368

Saturn's rings 368

Scales for ascertaining specific

gravity 126

Scale, -the musical 183

Scales, the pneumatic 16C

Schorl 21

Science of harmony, on what

founded 1S2

Scissors 75

Sclerotica .'237

Screw 93

a compound power .... 94
advantage of the .... 94
convex and concave ... 94
power of, how estimated . 94

Hunter's 95

of Archimedes 132

uses of the 95

"Sea-Eagle," experiment made

on board of the 109

Seasons, cause of the 350

" explanation of the cause 355,
356
Sea-water, cause of its increased

specific gravity 12G

Seebeck, Professor, discoveries of

in thermo-electricity .... 334

Selenium 20

Serpentine 21

Shadow 213

Shadows, darkest, how produced 214
Shadows from several luminous

bodies 215

Shadows, increasing and diminish

ing 214

Shadow of a spherical body, form

of 2U

Shadows, why of different degreed

of darkness 213

Sli aft . 81



462



Shet herds, balancing of in south

of Frame GT

Ships, on what principle they float 123

Sidereal time 3 ( J6

" year 39G

Silence produced by two sound? 177

Silica 20, 21

Silver best conductor of heat . . IS '

"Simple motion 55

Sidereal year, how measured . . 397
Signal-key of the electric tele-
graph 322

Signs of the zodiac 346

Signs used in almanacs .... 389

Silurus electricus . . 282

Silver 20

Siphon 132

Siphon, equilibrium of fluids ex-
emplified by means of the . . 133
Siphon, experiments with the . 167
" principle of the . . . .133

Sky, why blue 253

Slate formations in Bohemia . . 23
Slaves in West Indies, how they

steal rum 122

Steel, how made brittle .... 30

Sliding friction 98

Soiee's battery 290

Smoke, why it ascends 39

Snow, how formed .... 124, 150
" how it differs from hail . I'z4
Snow and ice, how made to melt

rapidly 191

Snuffers 75

Soap-bubble, thickest part of . . 23

Soda . . . 21

Sodium 20

Solar microscope 214

Solar system, account of the 337,338

time 396

" year, how measured .396,397

Solstices 358

Sonorous bodies 174

Sonorous property of bodies, to

what due 175

Sound 174

Sound affected by the furniture

of a room 179

Sound, by what laws reflected . .178
Sound, by what reflected and dis-
persed 179

Sound, focus of 179

Round, how communicated most

rapidly 175

Soui.d of the human voice . . . 179
" of strings, ho*y causoc 1 . .181
* rapidity of . ... . . 176



Sounds, distance to which the^
may be conveyed ...... 17^

Sounds, musical . 18?

" producing silence . . . 177

Sound, velocity of . . . .176 note

Sounds, what pleasing to tne ear 183

" when loudest . ... 174

Sources of heat 187

Space ............ 41

" how estimated 43

Speaking-trumpets 178

Specific gravity . . 40, 126 note, 410
Specific gravity of bodies, how as-
certained 125, 127, 417

Specific gravity, scalos 'or ascer-
taining 126

Specific gravity, standard of . . 123
" gravities, table of . . .124

Sphericity, centre of 37

Spectacles . . 236

Spectrum of a prism 254

Spherical aberration 247

Spherical body, how made to roll

down a s.'ope 68

Spider's web ?3

Spiral tube 274

Spirit level 113

Spirit or water level, with what

filled 113

Spots in the tun 304

Sportsman aiming at a bird ... 57
Spring, how high it will rise . . 137
Springs, how formed ..... 136
Spring-tides .... , . 391

Spur-gear 84

Spur-wheel 84

Square .... 48

Square rods, why bi tter than round

as conductors of electricity . . 279
Standard of specific gravity . . 123

Stars, distance of the 382

Stars, distance of the, Sir John

HerscheFs opinion of .... 383
Stars, how distinguished from

planets . 339

Stars, the fixed 381

Stars, why not seen in the day-
time 363

Stars, why not seen in their true

place . 384

Statics 17,18

Stationary steam-engine .... 209

Steam 195

Steamboats 205

Steam, cause of the ascent of . .124

" dry and invisible .... 19G

Steam engine applied to boat* . 103



INDEX.



463



Steam-engine, power of, how esti- ] Sun, planets and stars, inhabited 359



mated 199

Steam-engine, the ...... 1UG

" improvers of the . 2UO

Steam-engine, Neweoinen and Sa-
vary's 197

Sleaiu-engine, Watts' double act-
ing, condensing 197

S.eam-engine, Watts' improve-



Sun, rei appearance of the, how

caused 253

Sun's heat, effect of on the earth.150

Superior conjunction 349

" planets 343

ourinam eel 282

Suspension of action 85

Synchronous tickings of a clock . 104



uients of the 197 j Syracuse, King of, employs Ar-



Steain-engine, the locomotive



204,
208



Steam-engine, the stationary . . 209
Steam-engine, Tufts' stationary 207
Steam, foundation of its applica-
tion to machinery 30

Steam, how condensed into water 195



how made to act



196



chimedes to detect the adultera-
tion of a crown 127 note

. . 188
156, 163



Steam, on what its mechanical

agency depends 195

Bteatn, pressure of, on what de-
pendent 195

Steam-ship 203

Steam, space occupied by ... 196

" temperature of 195

" why it ascends '39

Steatite 21

Steelyards 75

" how to be used . . 74
Steelyards, mechanical principle

of the 73

Stereo-electric current 334

Stethoscope 175

Still 194

Stilts used in south of France . 67

Straight jet 163

Strata of the earth 20

Stream, velocity of, how measured 130
Strings, musical sounds of, how

produced 181

.Strings, musical quality of the

sounds of 181

Strontium 20

ftruve's opinion of the distance

of the stars 382

Substance, heterogeneous ... 19
" homogeneous .... 19

Sucker 100

Sulphate of copper battery . . . 292
Sulphate of copper battery (pro-
tected) 293

Sulphur 20

Sun, as cause of tides 391

" as viewed from the planets 360

" its size, &c 359

Sun, moon aud planets, relative
use of the 343



Syringes for striking fire
Syringe, the condensing

T.
Table of specific gravities



. 124
Table of the lengths of pendulums 104

" of velocities 42

Tackle and fall 89

Talc 21

Tangent 48, 60

Tantalus 133 note

Tantalus' cup 133

Tantalize, origin of the word . .133

Tapestry of Bayeux 380

Tea-pots, why they have handles

of wood 190

Teeth 83

Telegraph, atmospheric . . . .331

" Bain's 326

" electric, history of the 329
" electro-magnetic . . 319
Telegraph, electro-magnetic, rep-
resentation of the 323

Telegraph, electric, principles of

its construction 320

Telegraph, House's printing . 328

Telegraphic battery 321

Telegraph, meaning of . . 319 note

Telescopes 246

Telescope, achromatic . . . 247, 442
" Cassegrainian . . . 250
" day and night . . . 248
" Gregorian . . . 250, 443

liersehePs 251

" " power of .337

" Lord Rosse's . . 251, 444
" reflecting .... 240, 444

refracting ... 24C, 443

" simplest form of the . 247

Tellurium 20

Tenacity 27,32

" of cords 32

" of the metals . . . . 3
" of metals, how iiioroo^Hl 3?



464



INDEX.



Tenacity of various substances . 32 | Trumet, speaking . . .

fender of a steam-engine . . . 204 I Tubes, capillary

^erbium 20 1 " inercuru.1

Terrestrial gravity 34 i Tufts' stationary steain-engice

pi ! .&?,, .* i ; .!, A ne/> m _

Tungsten



Thermal effects of light .... 256

Thermometer 149

Celsius' 149

" Delisle's 149

" Fahrenheit's . . .149

Thermometer, on what principle

constructed 29

Thermometer, Reaumur's . . . 149

Thermo-electric 334

" batteries. . . .335

Thermo-electricity .... 2CO, 334

Thetis 339

Thorium 20

Threads of a screw 93

Thunder-clouds, distance of, how

measured 177

Thunder-house 277

Thunder-storm, safest position in.2l

Tides 390

" neap and spring 391

Time, apparent and true, differ-
ence between 397

Time as kept by clock and by the

sun 397

Time employed in the ascent and
descent of a body equal ... 54

Time, how estimated 43

" sidereal and solar .... 396
Time of ascent and descent of a

body 45

Tin 20

Tin and copper* sonorous proper-
ties of 30

Tin, not ductile 31

TLs.-'ue figure 270

Titanium 20

Toggle-joint 96

" operation of the . . 97

Tones of the voice, how varied . 180

Tonic 183

Tonnage of vessels, how estimated 123

Torpedo . . ." 282

Torricelli 143

Torricellian vacuum ..... 143
Towns and fortifications, attacks

on

Transfer of fluids 167

Transit of Mercury and Venus . 303

Translucent bodies 211

Transparent bodies 211

Tropic 356

Trumpet . 178

Titiujpets, hearing 178



Tycho Brahe .



17N

111

160

20'i

41

20

336



U.



Umbrella, use of in leaping fioiu

high places 38

Undershot wheel 82

Undulations of light 211

" of water, effects of . 131

Undulatory theory of light . . . 211
Universal discharger ... 272

Urania 339

Uranium 20

Uranus 369

" moons of 370

Ursa Major 398

Unit of Heat 4.80

Unit of Work 404

V.
Vacuum 98, 143

Vacuum, a perfect, not to be pro-
cured by means of the air-pump 156
Vacuum, the Torricellian . . . 143

Valve 152

Vanadium 20

Vapor, cause jf ascent of .... 12-1

Vapors 139

Vegetables, why white or yellow

when growing in dark places . 256
Vehicle in motion, cause of acci-
dents from 25

Velocities, table of 42

Velocity 41,71

" absolute and relative . . 42

" how estimated 42

Velocity of balls thrown by gun-
powder 63

Velocity of light and of the elec-
tric fluid 40

Velocity of parts of a body, how

diminished 60

j Velocity of sound . . .176 and note
63 j Velocity of sound, distances

measured by the 177

Velocity of sound, experiments of

Arago, Gay Lussac and others 170
Velocity of a stream how meas-
ured 130

Velocity of the surface of a
stream, greatest I2i !



INDEX.



405



Velocity required in machines,

bow regulated 106

Ventriloquism 180

Venus 363

" transit of 3C3

Venus, why never seen late at

night 363

Vertical line 37

Vesicular form of matter, defi-
nition of 19

Vespasian, battering-ram of , . 108

Vesper . . 363

Vessels, tonnage of, how esti-
mated 123

Vesta 339

Vision, angle of 219

Victoria 339

Vitreous electricity 262

Vitreous humor 237,239

Vitriol, effects of on water . . . 187
Voice, Dr. Rush's Treatise on the 180

" sound of the 179

Voice, the human, imitative pow-
er of the 180

Voice, tones of the, how varied . 180

Voltaic battery 289

" electricity . . . 259,283
pile . .' 288



War, how it has beeu elevated to

a science 63

Warmth of clothing, cause of . . 189
Watch, how it differs from a clock. 104

" how regulated 105

" moving power of a . . . 104

Water 21

Water, converted into steam, space

occupied by 30

Water, distilled, the standard of

specific gravity .123

Water, elasticity and compressi-
bility of 24

Water expands when freezing . .192
Water-fowl, buoyancy of . . . .123
Water frozen under the air-pump. 169
Water, how applied to move ma-
chinery 83, 419

Water, how converted into steam. 195
Water, how high raised by means

of common pump 153

Water, how much diminished in

bulk by pressure .... 29, 412
Water, instruments for raising . 131

Water-level 113

Water, motion of, how retarded . 129



Water, not destitute ol compress-
ibility 109

Water, of what composed . . 20
Water, pressure of at great

depths 109, 116

Water, pressure of at any depth,

how estimated 115

Water, pressure of at diflereat

depths 115

Water-pump 152

Water-spouts 172

Water, weight of a cubic foot of . 126 ,
" weight of a cubic inch of 115
Water when falling, why less in-
jurious than ice 114

Water, when perfectly pure . . 124
Water, why it appears more shal-
low than it is^ 231

Water-wheels 81,419

" most powerful . . 82

Watson, Dr., experiment of, to
show degree of evaporation . .150

Watt, James 106

Watt, James, his improvements

of the steam-engine 19?

Waves, how caused 130

Waves of light, laws of 212 note, 437

Wedge 92

" advantage of the .... 92
Wedge, effective power of. on

what dependent 92

W T edge, power of the 92

Wedges, use of 92

Wedgewood's pyrometer .... 193

Weight 34,72

" cause of 34

" lifter 165

Weight, loss of in bodies weighed

in water 126

Weight of any body, how ascer-
tained by its c'ibical contents . 125
Weight raised by wheel and axle,

how supported 79

Weight, what bodies have the

greatest 34

Welding 31

Wheel and axle 78

" " advantage of . 79

" " construction of . 79

" " how supported . 81

" principle of the . 80

Wheel, escapement 104

Wheels, friction . 99

Wheels in machinery acting as

levers 78

Wheels, large and small, advan-
tages of each 85



466



INDEX.



Wheels, locked, how and wo> . 85
Wheels of a clock, their U30 101

" power of 80

" size of limited bv iftat 85
" tires of how secured . 1 ( J3
Wheels, toothed, method ut ascci

taining power of 85

Wheels, use of on roads .... 85
\Vheol with teeth, of three kinds 34

Whirlwinds 172

Whispering-gallery 1/0

Whispering-gallery in Newbury-

port 179

Whisper, motion of a, rapidity of

the 170

White '251

Whitefield 179

Wick of a lamp, principle of the 111

Width 23

Wightuian's apparatus for inertia 25
William, Duke of Normandy . . 380
William the Conqueror .... 380
Winch applied to wheel and axle 79

" double 80

Wind . . 170

Wind, cause of the different direc-
tions of the 171

Wind, east, cause of at the equa-
tor 171

find Instruments, sound of, on

what iependent 181

Wind* juality oi the, ho\\ affect-
ed . 171



Wind, why it subsides at sunset . !TJ

Windlass 80

Windlass and capstan, difierence

between 80

Wind-mill? 80

Window, where the hand should

be applied to raise . . . . 77
Wollaston, experiments of ... 254
Wooden spoons and forks, why

preferred for ice 190

Woollen garments, why warm . 189
Worcester, Marquis of ... 20
Worm of a still . . ... 19.5
Work, Unit of, 404

Y.

Year 341

Year, leap 396

Year, sidereal and solar . . . 396
Yttrium . . 20



Zodiac . . 345



Zodiacal light 360

Zodiac, constellations of the,

change of 347

Zodiac, signs or the 34<

Zinc 20

Zinc, at what temperature malle-
able S3

Zirconium &



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YB 360CO



THE UNIVERSITY OF CALIFORNIA LIBRARY






Online LibraryRichard Green ParkerA school compendium of natural and experimental philosophy : embracing the elementary principles of mechanics, hydrostatics, hydraulics, pneumatics, acoustics, pyronomics, optics, electricity, galvanism, magnetism, electro-magnetism, magneto-electricity, astronomy : containing also a description of → online text (page 38 of 38)