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Tudor Specimen of Eozoon, J. W. Gregory, 486

B. Hayward, F.R.S., 465; Dr. B. A. Gould, 521 ; on the,
Turner (F.), the Acclimatization of the Avocado Pear in New M. Faye, 570
South Wales, 66

Vasey (Dr. George), Grasses of the South-West, 390
Turner (H. H.), Solar Disturbances of 1891, June 17, 404

Vaussenat (C. X.), Death and Obituary Notice of, 207
Turner (Sir W.), the Lesser Rorqual Whale, 454

Vedalia cardinalis successfully Colonized at the Cape of Good
Tutton (A. E.): Iron Carbonyl from Water Gas, 36; Further Hope, 615

Researches upon Azoimide, NH, 127; Phosphorous Oxide, Vedel (Lieut.), on the Polynesians, 615
ii., 214; Phosphorous Oxide, 446 ; ihe Properties of Amor- Veeder (Dr. M. A.): Auroras at Lyons, N.Y., 7; Red Light
phous Boron, 522

after Sunset, 30; Plan for Observations to Determine Local
Tylor (Dr. E. B.): the Limits of Savage Religion, 71; the Distribution and Altitude of, 234 ; Magnetic Storms, 557
Bow as Origin of Stringed Instruments, 184

Velocity, Molecular, Relation of Voltaic Electromotive Force to,
Tyndall (John, F.R.S.), New Fragments, 508

Dr. G. Gore, F.RS., 596
Typological Museums, General Pitt-Rivers, 184

Venus, Rotation of, Herr Loschardt, 210
Tyrell (J. B.), Geology of Lake Winnipeg, 115

Verbeek (Dr. R. D. M.), Relics of the Hindu Period in Java,

88

Vereker (Hon. J. G. P.), the Resolution of Podura, 239
Ungulates of South America, Aberrant Fossil, 608

Verner (W.), Threatened Extermination of the Kentish Plover,
Umney (J. C.), the Aconite Alkaloids, ii., 525

236
United States : Weather Bureau of the, 86 ; Education in, Vesuvius, Eruption of, 259

156; Production of Pig-Iron in, John Birkinbine, 208; Vibrations, on Earth, Dr. Emil Oddone, 510
the Paper-making Industry in the, J. F. Hobart, 279; U.S. Victoria : Victoria Agricultural Department, Results of the
Naval Observatory, Report of, 352 ; the Mountain Meteoro- Travelling Dairy, A. Crawford, 39; Hand-book of the De.
logical Stations of the United States, A. L. Rotch, 403 ; structive Insects of Victoria, C. French, 246 ; Experimental
the Study of Psychology as a Science in the United States, Perfume Farming in, 305 ; Viticulture for Victoria, F. de
E. W. Scripture, 568

Castella, 324
Units, C.G.S. System of, O. H. Tittmann, 581 ; Prof. J. D. Vienna, Annales of the University Observatory in, 138
Everett, F.R.S., 581

Vienna, a New Epidemic in, 349
Universal Atlas, the, 52

Vilmorin (Philippe L. de), Les Fleurs à Paris ; Culture et
Universities in Australia, Prof. Morris on, 426

Commerce, 510
Universities, Functions of, Prof. Geo. Fras. Fitzgerald, F.R.S., Vincent (M.), Thermometer-Temperature and Skin-Tempe-
513

rature, 304
University College, London, Proposed Extension of Physical | Violle (J.), Radiation of Incandescent Bodies and Optical
and Engineering Departments, 348

Measure of High Temperatures, 552
University Colleges in Great Britain, Report of Committee on Virial Equation for Gases and Vapours, on the, Prof. P. G.
Grants to, 544

Tait, 199
University Extension Movement, Lord Cranbrook and the, Virial of a System of Hard Colliding Bodies, on the, Lord
155

Rayleigh, F.R.S., 80
University, the Function of a, Prof. W. E. Ayrton, F.R.S., Vision, Peculiar Eyes, James Shaw, 104.
430

Viticulture: the Wines of the Medoc District, 279
University Intelligence, 23, 45, 70, 92, 118, 139, 162, 286, Viticulture for Victoria, F. de Castella, 324
334, 356, 381, 428, 449, 549, 622,

Vogel (Dr. E.), Praktisches Taschenbuch der Photographie, 51
University of London, W. T. Thiselton Dyer, F.R.S., 392; Vogel (Prof. H. C.): Motion of Stars in the Line of Sight,

Prof. E. Ray Lankester, F.R.S., 413 ; Prof. W. F. R. 280 ; the New Star in Auriga, 498
Weldon, F.R.S., 440

Volcanoes : Projected Abandonment of Villages near Colima
University, the Proposed Gresham, 323, 443, 517

(Mexico), in Consequence of Activity of Neighbouring Vol-
University, Teaching, for London, Royal Commission to inves- cano, 158 ; Volcanic Action in the British Isles, Sir Archi-
tigate the Question of a, 612

bald Geikie, F.R.S., 398 ; Volcanic Action in Eastern
Upham (Warren), Fossils recently Discovered near Boston,

Australia and Tasmania, T. W. E. David, 424 ; Eruption of
622

Vesuvius, 259 ; Discovery of Saltpetre and Soda in Kilima-
Uraninite, New Analyses of, W. F. Hillebrand, 119

Njaro District, 379
Uranium in Swedish Anthracitic Minerals, Discovery of, Baron Voltaic Electromotive Force, Relation of, to Molecular Velo.
Nordenskiöld, 209

city, Dr. G. Gore, F.R.S., 596
Urinary Secretion of Nitrogen, Dr. Gumlich on the, 599 Vonberg (Prof. Ignace), 518
Urine in some Infectious Maladies, Ptomaines extracted from,

A. B. Griffiths, 72
Useless Studies, Value of, Prof. Geo. Fras. Fitzgerald, F.R.S., “W = Mg,” Prof. Arthur G. Webster, 29
392

Waals's (Van der) Generalizations regarding “ Corresponding
Utilization of Homing Pigeons, W. B. Tegetnieier, 320

Temperatures, Pressures and Volumes, Prof. Sydney Young,

93

Waals's (Van der) Isothermal Equation, Prof. D. T. Korteweg
Vaccination of the Dog, the Tubercular, Héricourt and Richet, on, 152, 277
576

Wagner (Rudolf von), Manual of Chemical Technology,
Vacher (M.), Workmen Killed and Wounded in Accidents in 386
Germany, 350

Walker (Alfred O.), Destruction of Immature Sea-fish, 176
Vacuum Discharge Streamers, on the Action of, upon each Walker (G. T.), Repulsion and Rotation produced by Alternat
other, Dr. M. I. Pupin, 622

ing Electric Currents, 213
Vacuum Tubes and Electric Oscillations, Prof. Oliver J. Walker (J. J.), Ants' Nest Beetles, 351
Lodge, F.R.S., 366

Wallace (Dr. Alfred R.): Topical Selection and Mimicry, 30 ;
Valence of a Coloured Radiation, Hering, 115

the Naturalist in La Plata, W. H. Hudson, 553
Value of Useless Studies, Prof. Geo. Fras. Fitzgerald, F.R.S., Waller_(Augustus D.), an Introduction to Human Physiology,
392

Dr. E. H. Starling, 340
Value, an Introduction to the Theory of, William Smart, Ward (Prof. H. Marshall, F.R.S.): the Ginger-beer Plant, 190 ;
268

The Oak, a Popular Introduction to Forest Botany, 509
Varet (Raoul), Action of Metals on Salts Dissolved in Organic Warner Observatory, 422
Liquids, 360

Warning Colours, Frank E. Beddard, 78; Edward B. Poulton,
Variability of Nebulæ, Dr. Lewis Swift, 522

F.R.S., 174; W. L. Distant, 174
Variable Nebulæ, Some Apparently, Lewis Swift, 261

Washington Observations, 1886, 237
Variable Stars, Fuzziness of Some, Cuthbert G. Peek, 497 Washington Observations, 1887, 548
Variables, Two New, in Cepheus, Paul S. Yendall, 570 Washington Weather Bureau, Atlas issued by, 587
V ariation of Latitude, Dr. S. C. Chandler, 404, 589; Robert Washington, Wind-rush at, Prof. H. A. Hazen, 597

490

Water, an Elementary Hand-book on Potable, Floyd Davis, Wilson (F. R. L.), Action of Dry Hydrochloric Acid Gas on
Prof. Percy F. Frankland, F.R.S., 25

Dry Carbonates, 503
Water, Air and, Vivian B. Lewes, 531

Wilson (Prof.), Experiment Illustrating Power of Palladium of
Water Gas, Iron Carbonyl from, A. E. Tutton, 36

Occluding Hydrogen, 380
Water Jets, Sensitive, W. B. Croft, 606

Winchester, Macro Lepidoptera and Birds of, 115
Water-supply of London, John Hopkinson, 88; Appointment Wines of the Medoc District, the, 279
of Commission on, 470

Wing in Dinornis, Evidence of a, Henry 0. Forbes, 257
Watson (Rev. H. W., F.R.S.), on the Boltzmann-Maxwell Wind Direction, 149
Law of Partition of Kinetic Energy, 512

Wind-rush at Washington, Prof. H. A. Hazen, 594
Watson (Sereno), Obituary Notice of, 494

Winnecke's Comet, Dr. G. F. Haerdtl, 617
Watson (W.), Effect of Fog on Plants Grown in the Houses at Winnipeg, Lake, Geology of, J. B. Tyrell, 115
Kew, 16

Winter Storms of Northern India, Henry F. Blanford, F.R.S.,
Wave-motion Model, F. Cheshire, 347.
Waves, Remarkable Illustration of Height of Breaking, 305 Wislicenus (Herr Dr. Walter), on the Influence of Ring and
Weather-cock, Self-Registering, J. Lawrence-Hamilton, 559 Disk Blinds in Micrometic Measurements, 137
Weaving as practised by the Navajo Indians, Dr. Shufeldt, Wissmann (Hermann von), My Second Journey through
260

Equatorial Africa, 507
Weber (Prof. Max), Freshwater Fauna of Sumatra, Java, &c., Within an Hour of London Town, 557
408

Woeikof (Dr. A.), Cold Waves, 357
Webster (Prof. Arthur G.), “ W = Mg," 29

Wolf (Rodolf), Solar Activity in, 1891, 307
Weight, Examination of the Standards of Measure and, im- Wolf's Periodic Comet, 42; Dr. Berberich, 237
mured in the Houses of Parliament, 543

Wolf's Comet, 1891, II ; Herr Dr. Thraen, 548
Weinschenk (E.), Meteoric Iron, 69

Woll's Numbers for 1891, 307
Weismannism, a Difficulty in, Edward B. Poulton, F.R.S., Wolstenholme (Prof. Joseph), Death of, 85

52; Prof. Marcus Hartog, 102 ; A. H. Trow, 102, 175 Wood (Sir H. Trueman), Light, 269
Weiss (F. E.), Caoutchouc-containing Cells of Eucommia Woods, Furniture, D. Deeming, 459
ulmoides, 335

Woodward (Mr. A. S.), Appointed Assistant Keeper of Depart-
Weldon (W. F. R.), the Renal Organs of certain Decapod ment of Geology at British Museum, 566
Crustacea, 140

Woodward (M. F.), the Milk Dentition of Procavia (Hyrax)
Weldon (Prof. W. F. R., F.R.S.), the University of London, capensis, 287 ; Teeth Development in the Marsupialia, 333
440

Worship, Dwarfs and Dwarf, Harold Crichton-Browne, 269
Wells (H. L.), a Series of Cæsium Trihalides, 310

Worthington (A. M.), the Mechanical Stretching of Liquids,
Wells and Penfield (Messrs.), Remarkable Series of Compounds 358

of Halogen Salts of Cæsium with Two or more Atoms of Wray (Leonard, Jun.), the Ipoh Poison of the Malay Penin-
Chlorine, Bromine, or Iodine, 325

sula, 278
Werigo's (Dr.) Experiments respecting Influence of Oxygen on Wright (C. R. Alder, F.R.S.), on Certain Ternary Alloys, v.,

Elimination of Carbon Dioxide of Lungs, Prof. Zuntz, 576 381
Wernadsky (W.), the Sillimanite Group and the Part played by Wright (Prof. G. Frederick): the Theory of an Interglacial Sub-
Aluminium in the Silicates, 141

mergence in England, 310; Cirques, 317
Wesendonck (Prof.), Gaseous Carbonic Acid not capable of Wrightson (J.), Farm Crops, 247

Generating Electricity by Mechanical Friction on Metal, 306
West India Islands, Zoology and Botany of the, 139
West Indies, Dr. J. T. Rothrock on the Flora &c. of the Yahgan, the, P. Hyades and J. Deniker, 577
Bahamas and Jamaica, 596

Yarrow (A. S.), on Balancing Marine Engines and the Vibration
Westgate-on-Sea, Aurora Visible from, 613

of Vessels, 571
Wethered (Edward), on the Microscopic Structure and Residues Year, the Origin of the, J. Norman Lockyer, F.R.S., 487

Insoluble in Hydrochloric Acid in the Devonian Limestone of Year-book of Science, 1891, Prof. T. G. Bonney, F.R.S., 604
South Devon, 597

Yeast, Milk Ferment Identical with Kefyr, in use in Canada and
Weyl (Dr. Th.), Animals rendered Immune to Anthrax, 312 United States, C. L. Mix, 471
Whale, a Steamer's Encounter with a, 88

Yellow Butterflies, Pigment in, F. Gowland Hopkins, 197
Whale, the Lesser Rorqual, Sir W. Turner, 454

Yendall (Paul S.), Two New Variables in Cepheus, 570
Wheat, Rust Fungus in, 615

Yezo, the Fauna of, Dr. Adolf Fritz, 89
Wheat in Ohio, the Average Yield of, geologically considered, Young (Prof. C. A.): Note on the Chromosphere Spectrum, 28 ;
420

the Chromosphere Line 1 6676-9, 198
Whipple (G. M.), Magnetic Disturbance, 364

Young (Prof. Sydney), Van der Waals's Generalizations regard.
Whitaker's Almanack for 1892, 156

ing “ Corresponding ” Temperatures, Pressures, and Volumes,
Whitcombe (Rev. R. H.), Elementary Trigonometry, 174

93
White (W. N., F.R.S.), the Influence of Shallow Water upon Younghusband (Capt.), Journeys in the Pamirs and Adjacent
the Trial Trip Speeds of Modern Vessels, 571

Countries, 353
White (William), Darwinian Theory, 53
Whiteley (R. Lloyd), Chemical Calculations, 604
Whitney (W. Dwight), the Century Dictionary, 316

Zebra, on the Attitudes of the, during Sleep, and their Influence
Whymper (Edward): how to Use the Aneroid Barometer, 339 ; on the Protective Value of its Stripes, 248

Travels among the Great Andes of the Equator, Prof. T. G. Zebra, Skin of Grevy's, brought from Somaliland, 598
Bonney, F.R.S., 561

Zebras, Notes on, S. B. Carlill, 526
Wiborgh's (Prof.) Air-Pyrometer, John Crum, 304

Zeitschrift für Anorganische Chemie, 421
Wild (H.), the Magnetic Storms of February 13-14, 1892, 480 Zeitschrift für Pflanzenkrankheiten, 20
Wilkins (A.), Intelligence in Birds, 151

Zimbabwe Ruins, Finds at the Great, Theodore Bent, 551
Wilks (W.), the Place of Horticulture in Technical Education, Zodiacal Light, 0. T. Sherman, 381
38

Zoology : Zoological Gardens, Additions to, 21, 41, 67, 89,
Willey (Arthur), a new Genus of Synascidians from Japan, 450 116, 137, 159, 186, 210, 236, 260, 280, 307, 325, 351, 380,
Williams (Dr. C. Theodore), Value of Meteorological Instru. 404, 422, 445, 472, 497, 521, 547, 569, 589, 616; the Death
ments in Selection of Health Resorts, 551

of the Giraffe, 518; Zoological Society, 70, 164, 287,
Williams (F. N.), the Genus Dianthus, 383

383, 430, 503, 526, 597; Enormous American Lizard,
Williams (Prof. G. H.): a Geological Excursion in Maryland, L. Stejneger, 40; Herr Lehmann on the Camel, 87;

235; the part played in Growth of Geological Opinion by Prof. Cossar Ewart on Scottish Zoology, 87; Zoological
Regions near great Universities, 519

Regions, G. A. Boulenger, 104 ; Dr. Stirling's New Aus-
Williams (J. Francon) and William Hughes, the Advanced tralian Animal (Notoryctes typhlops), J. D. Ogilby, 135;
Class-Book of Modern Geography, 460

Squirrels in Winter, C. Fitzgerald, 136; Zoology and Botany
Willis (J. C.), the Method of Fertilization in Ixora, 455

of the West India Islands, 139; Text-book of Comparative

to Nature

1892

Anatomy, Arnold Lang, 145; Lehrbuch der Vergleich-
enden Entwickelungsgeschichte der Wirbellosen Thiere,
Dr. E. Korschelt und Dr. K. Heider, 145 ; the Migration of
the Lemming, F. Howard Collins, 149 ; W. Duppa Crotch,
194, 294 ; Prof. George J. Romanes, F.R.S., 249; W.
Mattieu-Williams, 294 ; Big Game in India, Harold Little-
dale, 158 ; Discovery of New Species of Frog in New Jersey,
Prof. E. D. Cope, 208 ; Animal.Sketches, C. Lloyd Morgan,
291; Animals recently Extinct or Threatened with Extermina-
tion, F. A. Lucas, 305 ; Freshwater Springs in the Buffalo
Bay and Niagara Region, Dr. Kellicott, 305 ; Zoology of the
Sandwich Islands, Mr. R. C. L. Perkins Selected to Inves.
tigate the, 322 ; the Hydrocorallinæ Collected by Prof.

Haddon in Torres Straits, S. J. Hickson, 497 ; Freshwater
Fauna of Sumatra, Java, &c., Prof. Max Weber, 408 ; the
Puma, P. W. True, 445; the Lesser Rorqual Whale, Sir W.
Turner, 454 ; Zoological Record for 1890, 483 ; a Zoologist
on Disease, Dr. Elie Metschnikoff, Prof. E. Ray Lankester,
F.R.S., 505; Mr. Charles Hose's Collections, 517; Notes on
Zebras, S. B. Carlill, 526 ; a New Oryx (Oryx callotis), 526 ;
the New Imperial German Zoological Station at Heligo-
land, 544; Egg of the Extinct Gigantic Bird of Madagascar

Æpyornis maximus, 586
Zune (M.), the Composition of Hæmocyanin, 456
Zuntz (Prof.), Dr. Werigo's Experiments respecting Influerce

of Oxygen on Elimination of Carbon Dioxide by Lungs, 576

[graphic][subsumed][merged small][merged small]

THIS

THURSDAY, NOVEMBER 5, 1891.

The book is divided into two parts, dealing respectively with phenomena and their laws, and practical applica

tions ; or, speaking briefly, theory and practice. In the ELECTRICITY AND MAGNETISM.

theoretical part, magnetism is first treated, then electricity,

in the order statical electricity, electro-chemistry, and Electricity and Magnetism. Translated from the French electro-magnetism. In the practical part are comprised

of Amédée Guillemin. Revised and Edited by Silvanus telegraphy and telephony, electric lighting and transP. Thompson, D.Sc., F.R.S. (London: Macmillan mission of power, and a number of minor, but in themand Co., 1891.)

selves important, applications, such as clockwork-driving CHIS work is an English translation of M. Amédée and regulation, electricity in warfare, and electroplating.

popular treatise of electricity. We Of the treatment of these subjects we can give here only are informed, in the preface, that the translation has been the merest sketch, noting as we do so a few points in in great part executed by Mr. Colman C. Starling and which the book seems to call for modification or imProf. Walmsley, under the editorship of Dr. Silvanus P. provement in a new edition. Thompson. It is a splendidly illustrated and beautifully The theoretical part begins with a brief account of the got-up book, designed, so the editor says, rather for the natural history of magnetism, then passes to a discussion table of the drawing-room than for the desk of the of the polar theory of magnetism, starting with the notion student.

of Thales that a magnet had a soul, and ending with the We doubt whether, in fashionable drawing-rooms at experiments of Coulomb and their results. An excellent any rate, scientific curiosity exists to any great extent; description of Coulomb's torsion-balance experiments is but now that large houses are very frequently lighted given, and then follow the methods devised by Coulomb with electricity there may be a minority of people who and Jamin for the determination of the distribution of are willing to spend any spare time left over from more magnetism in magnets. It is hardly correct to say, as is absorbing drawing-room occupations in learning some- done on p. 33, that Coulomb's method "enabled him to thing of how the light is produced and of other applica- study the distribution of magnetism in magnets; that is tions of electricity. For such a public the present work to say, how the magnetism at the surface varies along the seems exceedingly well adapted. It is popularly and magnet between one end and the other.” Apart from attractively written, so far as a translation from a the objection that the field at any point external to the foreign tongue, supplemented, and to some extent cor- surface of the bar depends really upon the whole distriburected, by editorial paragraphs, can well be ; it is pro- tion of magnetism, and not merely on that supposed to be fusely illustrated, and comprehensive to an extent which near the point, and the further objection (which also does has made the book almost too bulky for convenient not seem to be stated here) that the vibrating needle itself perusal.

affects the magnetization of the magnet, it is quite certain Still, the remnant of people by whom popular scientific that this method, like others devised for the same purpose, treatises such as this are welcomed, though numerous in cannot be made to give any definite information except itself, is, alas, only a very small minority of that great as to the surface-distribution of magnetism, which, as and influential section of the British public who are Gauss showed, can be made to replace the magnet so far brought directly into contact every hour of their lives as the external field is concerned. By none of these with the wonderful practical results of the progress of methods can any information whatever be obtained as to science. The great majority converse through tele- the actual magnetization of a bar of finite cross-section. phones, consult their watches, and send telegrams, and It would have been well also if the editor had here know no more than a Hottentot does how a telephone appended a note as to the essential inaccuracy of Jamin's acts, a watch goes, or a telegraph message is transmitted. method“ of placing on the point that we wish to study a

small contact-piece of soft iron, and of measuring by what strikes one as strange indeed is that in the chapter means of a graduated spring that gradually extended, the on thermo-electricity Peltier's name is only mentioned in force requisite to detach the iron," and given a description connection with an illustration showing what is called of the much more satisfactory method adopted by Row- his "thermo-electric pince.” Not a word is said on the land and others.

subject of the Peltier effect, or the Thomson effect, not to After a chapter on methods of magnetization, in which speak of the bearing of these on thermo-electric theory ! all the ancient and now discarded methods of "touch" Again, no mention appears to be made of any form of are described, we have an excellent popular discussion of secondary cell except that of Planté: surely some of the terrestrial magnetism, ending with a splendidly illustrated modern forms now so largely in use in practice for electric account of auroræ. The introduction of the subject of lighting, traction, &c:, might have been figured and auroræ at this point is justified on the ground that they described. are electrical phenomena connected with the magnetism The next section of theory, electro-magnetism, has three of the earth, and a sketch is given of the various theories chapters devoted to it. The main phenomena are well which have been proposed.

described, and excellently illustrated by diagrams. Here Passing now to the subject of electricity, we have the only forms of tangent and sine galvanometer figured the same wealth of illustration, though many of the are those of Pouillet (one of these (p. 337) has an smaller cuts, like some of those in the section on mag- enormous needle). Some of the splendid instruments netism, are old familiar friends. Electrical machines which have been made for absolute measurements (for are described, from Otto Guericke's down to Wimshurst's. i example, Fitzgerald's tangent galvanometer) ought surely Nothing impresses us as more indicative of the enormous to find a place in a work like the present, published as it advance of electrical science in recent times than a com- is at a time when currents, &c., are no longer measured parison of Plates V. and XIII. of this book. The former, in arbitrary units, and their determinations are as far as a well-known picture, represents an electrical machine possible divested of errors arising from instrumental "according to the model in fashion about 1754”; the peculiarities and accidents of place. A definition might latter, a large Edison steam-dynamo. In the former a also have been given here of the electro-magnetic unit of bevy of ladies and gentlemen in the costume of last current, with some indication, where the constant of a century are grouped round a sulphur ball machine, which galvanometer is referred to, of how it is possible to a gentleman in powdered wig and ruffles is vigorously measure currents in absolute units, and the importance turning by means of a crank attached to a large and much in this respect of electro-magnetic instruments, the conornamented driving-wheel of wood. Evidently we have stants of which can be determined from their dimensions here electricity in the drawing-room,” as practised and arrangement. At p. 333 a current of so many amperes in the middle of last century. On the other plate is referred to as producing a certain force at the needle,

a large modern steam-engine, in all its but we have not anywhere, so far as we have been able array of steam-pipes, balanced cranks, and connect- to discover, a definition of an ampere. ing-rods, resting on a massive bed-plate of iron The following passage (p. 369) apparently quoted from bolted to a base of masonry, and driving an enormous Faraday's “Researches," was at first sight rather startling : dynamo. The somewhat dilettante group of men and “In this state of circumstance(s) the force of the electrowomen have disappeared, and in their place stands a magnet was developed by sending an electric current typical Yankee engineer, oil-can in hand, and coatless, through its coils, and immediately the image of the lampintently regarding the bearings of the engine. Here there flame continued magnetic.It is almost needless to say is no unnecessary ornamentation, no suggestion of elegant that a reference to the “Researches” showed that the trifling, everything is sternly suggestive of work and copyist had dropped out a line from Faraday's account nothing else. Nevertheless, in the contrast, the real of the actual phenomenon, which was not exactly that dignity and beauty is with the present, not with the past ; asserted in the quotation. After “fame” supply the with modern science in the laboratory, the workshop, or words " became visible, and continued so as long as the the factory; with work carried on in the deepest earnest, arrangement.” with plain duty-doing, irrespective of sensation or ap- The second part of the book is most excellent. All plause.

applications of electricity of any importance are fully Next comes an account of batteries, which (like several described, and magnificent cuts, without stint, illustrate other parts of the book) we think might very well have in the clearest manner the marvellous and complex conbeen lightened by ignoring old and obsolete pieces of trivances and arrangements now in use in the various apparatus ; after that, we have a discussion of the pro- systems of telegraphy and telephony, electric lighting, duction of electric currents. In a book of this size, in &c., &c. Full-page plates of the illumination of Tunis which a considerable amount of space is devoted to things by the search-lights of the French fleet, the electric light relatively unimportant, the subject of electrolysis might in use in the erection of a great Parisian magasin, the have been more fully treated ; for example, there are head-light of a locomotive illuminating the track, the matters connected with electrolytic theories to which, interior of one of the Paris forts during the siege, and since such a theory as that of Clausius is introduced, other subjects, serve to show the great part now played a few pages might very well have been devoted. The by electricity in all branches of industry and the arts, absolute measurement of currents by means of electrolysis even including warfare, slow as that is in some respects from the known electro-chemical equivalents of different to profit by the latest results of scientific invention. No substances is not referred to ; indeed, an electro-chemical book could form a more attractive and useful present for equivalent does not seem to be anywhere defined. But a boy with a taste for mechanics and practical electrical

we

see

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