his best productions, among those in which he is absolutely himself. It has been at once the good and the evil fortune of this strange genius to have succeeded too soon. He was still en rhétorique when Philipon, the publisher, brought out his first work, an album of caricatures of the labours of Hercules. The public found in it such cleverness, such good-humour, and such astonishing facility with the pencil, that they adopted the child,-and one saw, incredible prodigy, an artist of seventeen earning his bread! From the moment of his début, Doré had nothing but success, and success of more than one sort, for nature has been bountiful to him. He played the violin like a laureate of the Conservatoire; he sang with a beautiful tenorino voice, in such a way as to deserve the applause of Rossini; he was as great an athlete as the most muscular undergraduate of Oxford or Cambridge. His genial and loyal character disarmed envy; while his private life under his mother's roof wins universal esteem. In one word, ever since his five-andtwentieth year, his life, unique in its character, has been one long triumph, cheered by an incessant toil, happy, easy, and coulant de source. We Frenchmen are styled capricious, yet we have never tired of his works; we have never even shown ourselves satiated; we have never found that the author produces enough. Publishers of prints, of journals, of books, have not for one moment ceased plaguing him. I have seen him over and over again finish a design on wood while the publisher's messenger was waiting at the door. The misfortune is, that this rapid production under pressure ever since he began his career has not left him time to complete the studies which make great masters. The public expected other things of him than marvellous sketches. They laid him under an injunction, so to say, to undertake vaster and more finished works, but have not left him the time necessary. That is why I prefer his living and sparkling studies of Spain to the large designs in the Dante and Bible, where we don't find Michel-Angelo or Doré either.

Although M. Gustave Masson has made mention, in the Athenæum of the 27th of December, of the 'Lettres à une Inconnue,' I hope you will allow me to return to the subject. Two volumes of letters written by Mérimée, a whole romance, the heroine of which has chosen to hide her name, that is enough to furnish plenty of occupation to lovers of good French and investigators of mysteries. First let me say that the form of this singular work is as chaste, as delicate, as correct, as that of the best productions of the author; that in it he shows a wonderfully free and vivacious judgment, carried to the point of rudeness, a singular contempt for men in general, and the official world in which he lived in particular. This characteristic is so striking, that one is tempted to ask what possible reason took him into such society; and why, looking on the Senate as a parcel of incapables, he became a senator? Was it for the pleasure of leaving 30,000 francs a year to two elderly ladies who soothed by their attentions the sorrows of his old age? He had no need of money, as his patrimony, 12,000 francs a year, sufficed for his simple wants. I can understand that he enjoyed, at first, the spectacle of human life in its most dazzling holiday dress; but I should have supposed that he would have had enough of it at the end of a few years, and I am really astonished that, weary and ill as he was, he endured till the last the uncouth pleasures, the folly of which he laughed at. The only plausible explanation of this anomaly lies, I believe, in a sincere and profound affection, which he concealed, like all his good feelings, from a sceptical shyness. I met him sometimes at his own house, or at the houses of common friends, but I cannot say that I knew him. He was extremely pleasant, but even more impenetrable than pleasant. A whole side of his life remained unknown even to his best friends; and if one day

we learn the real truth about his nature, it will be from some woman's indiscretion. He was very handsome, very impressionable, and, without doubt, passionately loved; and he must have carried on

a certain number of liaisons, more or less Platonic. for some time engaged, and which will contain His executor was charged to send four rings, and new expositions of some of the leading princihe received four answers, one of which was written ples of Political Economy. Amongst other subin the hand which re-copied for the publisher thejects treated of in the volume will be the doc'Lettres à une Inconnue.' But the executor is a cautious man, and he will tell nothing more than trine of Value, the relations of Labour and this. The Parisian world is racking its brains to Capital, with an investigation into the power find out the name of the heroine. Madame de M. of Strikes to influence Wages, the functions of was first mentioned; then Madame de B.; after her, Trades Unions, &c. The volume will also conMdlle. d'A.; and, finally, one of your country-tain an examination of the principles of Interwomen, called R. S.; but the first two theories cannot bear examination, and there are serious objections to the two others. Taine, who wrote a very nice essay as an introduction to the first volume, is no wiser than I on this delicate point; and Dumas fils, who has little liking for insoluble problems, remarked to me at dinner the other evening, that Mérimée was great at mysteries, and capable of writing two volumes of letters to posterity, under cover to a person who had no existence. I greatly doubt if he pushed his malice so far; had he written for the world, he would have concealed his foibles better and talked less about his health.

Since I have written close together the names of Taine and Dumas, one word in conclusion about the Academy. Three elections are promised for the 29th of January. The candidates are numberless. The old house is besieged by an army of professors, and even by some writers. Were my advice asked, I should say, "Take Dumas, Taine, and Weiss, and send the rest back to the College de France." But the Academy has nothing to ask of me, nor I of the Academy. Taine was certain of his election a fortnight ago, in spite of the hatred of the clerical party, who will never forgive him; but lately the Republican liberals have learned that he is engaged on a book, in which he shows little sympathy with the French Revolution, and this work, still unpublished, is likely to cost him dear. As for Dumas, he remembers the injustice with which the Academy treated his father; and after having kept long in the background, he will not declare himself a candidate, unless in real earnest. One of his friends, M. Legouvé, is to reconnoitre the ground to-day or to-morrow, and see if there is a majority ready. However matters may turn out, the Academy will do wisely not to trifle with the authors who knock at its door, for neither Dumas nor Taine is of the stuff of which perpetual candidates are made, and were they to fail once, they are capable of leaving the place wholly to the pedants.

EDMOND ABOUT.

Literary Gossip.

OUR readers will remember that in 1856

appeared the Memorials of Henry Cockburn, one of the Judges of the Court of Session in Scotland, containing many graphic and piquant sketches of the men and women of his day. The volume ended with the year 1830, and, although nothing more was promised, it was known by Lord Cockburn's friends that he had continued his diary until 1854, the year in which he died. This continuation is now in the press, and will be published by Messrs. Edmonston & Douglas before Easter.

We believe that the real meaning of the fuss at Eton is, that Dr. Hornby thinks that the little boys who need to be managed would fare best under the control of masters of experience, while the big boys, who wish to compete for scholarships, would be best taught by young men fresh from the Universities, whose Latin and Greek have not had time to grow rusty. Dr. Hornby has as yet, however, taken no decisive step towards the attainment of this apparently reasonable object.

WE understand that Prof. Cairnes will shortly pablish a work on which he has been

national Trade, and, in connexion with this, a criticism of protectionist theories as advanced by American writers.

THE first issue of books to members of the

Hunterian Club, for the second year, is almost ready, and the delivery will be made early in 1874. It will comprise the following:Alexander Craig's Poeticall Essayes,' 1604; Poeticall Recreations,' 1623; 'Pilgrime and Heremite,' 1631; 'Miscellaneous Poems,' and Introduction by Mr. David Laing; Samuel Rowlands's 'Diogenes Lanthorne,' 1607, and 'A Fooles Bolt is soone Shott,' 1614; and 'The Bannatyne MS.,' 1568, Part I. In addition to these, there will be sent out, Richard Niccoll's 'Sir Thomas Overburie's Vision,' 1616, with Introductory Notice by Mr. Maidment, of Edinburgh, which is presented to the members by one of the Council of the Club. There will be a second issue for the same subscription, but to what extent will of course depend on the money in hand. The undernoted works are all in progress :-'The Bannatyne MS.,' Part II.; Samuel Rowlands's Letting of Humors Blood in the Head Vaine,' 1600; A Terrible Battell' [1602?]; 'Martin Markall,' 1610; 'The Miracles of our Lord The and Saluiour Jesus Christ,' 1618. Council has announced to the members that one of its number has offered to defray the entire cost of the reproduction of "The Nightingale. Sheretine and Mariana. A Happy Husband. Elegies on the Death of Queene Anne. Songs and Sonnets, by Patrick Hannay, gent. London, printed for Nathaniel Butter, 1622." The original is of very great rarity; Archdeacon Wrangham's copy brought 407. With the exception of the Songs and Sonnets,' sixteen copies of which were thrown off by Mr. Utterson, at the Beldornie Press, Hannay's works have never been reprinted. The volume consists of 132 leaves, and will be issued with the books for the

third year.

MR. O'SHAUGHNESSY will have ready in the spring a new volume of Songs and Poems, under the title of 'Music and Moonlight.'

PROF. A. W. WARD'S forthcoming book on long by Messrs. Macmillan, is, we hear, to be the English Drama,' to be published before a full account of the Origines of our Drama; and a section is devoted to each of the more

important names among our dramatic writers. Perhaps we may mention that Prof. Ward's studies have lain for years among German subjects of all kinds, and not least among German criticisms of the Drama; but we are told that his chapters on the Origines are the working out of a quite independent view.

THE pleasant story called 'Ladybank Junction,' which appeared a month or two back in Blackwood's Magazine, is from the pen of Mrs. Oliphant.

PROF. M. BURROWS, Chichele Professor of Modern History at Oxford, is about to bring

out a work on the 'Worthies of All Souls' College.'

MESSRS. WILLIAMS & NORGATE will publish shortly the Reports to the Trustees of the British Museum on the Utrecht Psalter, by Mr. Bond and Mr. Thompson, of the MS. department, and also by Canon Swainson, the Rev. H. J. Coxe, of the Bodleian, Mr. Digby Wyatt, Prof. Westwood, and others. Several fac-similes of the Psalter, taken by the autotype process, will accompany the work.

MR. FURNIVALL has found, in the City Hustings Rolls of Deeds and Wills, enrolments of three deeds in 1372 and 1373, by a Henry Chaucer, vintner, and Juliana his wife, daughter and heiress of John le Botyner, but has not yet been able to trace the connexion between this Henry Chaucer and Geoffrey the poet, though, as the latter would have been forty-two or forty-three in 1372-3, Henry may well have been Geoffrey's brother or cousin. With regard to Thomas Chaucer, the City Rolls have as yet furnished no evidence of his relationship to the poet; indeed, a deed of entail of certain property on him, by his "consanguineus," | "Willelmus Chaumbre, clericus," dated 12th of March, 1406, tends to disconnect Thomas from Geoffrey Chaucer. On the other hand, the purchase of a reversion in certain lands in 1413 by Thomas Chaucer (esquire), Henry Somer, John Cornwaleys, John Tyrell, and Lewis John, makes Mr. Furnivall believe that all these men were trustees for some Corporation in the City. Another conveyance to Thomas Chaucer and twelve other men, all of them described in one place as citizens and vintners, though in another place Thomas Chaucer and another of the twelve are called esquires, leaves no doubt that the whole thirteen were trustees for the Vintners' Com

Thomas Chaucer is thus connected with Geoffrey's father's and uncle's company, though not as Geoffrey's son, Mr. Furnivall thinks.

Prof. Karl Elze, the author of a Life of Lord Byron, is going to publish a translation into English of some essays on Shakspeare. Writing the name reminds us that Herr Elze's last essay is another discussion of the often discussed orthography of Shakspeare's name. Another is on 'Shakespeare's Supposed Travels,'

and one on Hamlet in France.' The aim of

the volume is to unite the wide scope and

ardour of the so-called Transcendental school

of criticism with more modern methods, historic and comparative; and it consists of complete accounts in this sense of some of the

main dramas, and of elucidations of more incidental departments of the story of the poet and his period. The publishers are to be

Messrs. Macmillan.

We recommend this note to the attention of the Editor of The Day of Rest :—

"The Day of Rest, for December 6th, opens with a poem by Dora Greenwell, entitled 'A Story of Canada.' The same poem appears in the volume of Good Words, for 1861, under the heading, "The Emigrant's Daughter.' I promised that I would bring the complaint before your notice.

PATERFAMILIAS." THE new edition of Dr. Whitaker's History of Whalley,' which was under the editorship of the late Mr. John Gough Nichols, will be completed by the Rev. Ponsonby A. Lyons. At the time of Mr. Nichols's decease more than 300 pages of the second and concluding volume were in type.

A WORK of considerable local interest will shortly be published, entitled 'Memorials of the Streets of Manchester.' It will contain a number of illustrations, consisting of views of streets and buildings which possess historic interest. Mr. Thomas Sutcliffe, of Manchester, interest. Mr. Thomas Sutcliffe, of Manchester, is the publisher of the volume.

WITH the gay and brilliant crowd of Christmas books appear the grave blue covers that indicate "Reports and Papers." The November flight of these winged words is not, indeed, numerous; but a larger and more important flock darkens the more distant sky. In plain English, the Parliamentary Reports and Papers for November are seventeen in number; amongst which the Report of the Commissioners as to Patents for Inventions for the year 1872, with plan, and the 51st Report of the Commissioners of Woods, Forests, and Land Revenues for the year ending 31st of March 1873, are the most noteworthy. The Papers by Command are six, including the First Report by the Director General on the Education of Officers in the Army. Lists are appended of the Commercial Reports from H.M. Consuls, from H.M. Secretaries of Embassy, and Reports from H.M. Consuls on British Trade Abroad, amounting in all to 113, and containing a vast mass of most useful information.

M. J. PH. BERJEAU is preparing for the press a fac-simile reprint, with introduction, French and English translations of a Dutch narrative of the second voyage of Vasco de Gama to the East Indies. The book, unknown to bibliographers, was printed in Antwerp, circa 1504, 4to., and is now in the British

Museum.

THE death is just announced of Mr. Edward Hyde Clarke, who was fifty years ago a prominent writer on West Indian questions.

THE Early English Text Society will issue to its members in January, in its Original Series, No. 56, The Gest Historiale of the Destruction of Troy,' translated from Guido de Colonna, in alliterative verse, and edited from the unique MS. in the Hunterian Museum, Glasgow, by Mr. D. Donaldson and the late Rev. G. A. Panton, Part II.; No. 57, 'The Early English Version of the Cursor Mundi,' in four texts, from MS. Cotton, Vesp. A. iii. in the British Museum, Fairfax MS. 14 in the Bodleian, the Göttingen MS. Theol. 107, MS. R. 3, 8 in Trinity College, Cambridge, edited by the Rev. R. Morris, Part I., with two photo-lithographic fac-similes by Cooke & Fotheringham. In its Extra Series, No. 20, Henry Lonelich's 'History of the Holy Grail' (translated from the French prose of Sires Robiers de Borron), re-edited from the unique MS. in Corpus Christi College, Cambridge, by F. J. Furnivall, Esq., Part I. The Society has the following books in the press for its Original Series :-The Lay Folk's Mass-Book,' four texts, edited from the MSS., by the Rev. T. F. Simmons; 'Palladius on Husbondrie,' englisht (ab. 1420 A.D.), edited from the unique MS. in Colchester Castle, by the Rev. B. Lodge, Part II.; 'The Blickling Homilies,' edited from the Marquis of Lothian's Anglo-Saxon MS. of the tenth century, by the Rev. Richard Morris, with a photo-lithograph; Merlin,' Part IV., containing preface, index, and glossary, edited by H. B. Wheatley, Esq.; Generydes,' a romance, edited from the

unique MS. (ab. 1440 A.D.) in Trinity College, Cambridge, by W. Aldis Wright, Esq., Part II. And these for its Extra Series:-" Barbour's Bruce,' Part II., edited from the MSS. and early printed editions by the Rev. W. W. Skeat; Early English Pronunciation,' with especial reference to Shakspere and Chaucer, by A. J. Ellis, Esq., Part IV.

In his Annual Report the Librarian of the United States Congress mentions, the American papers tell us, that 12,407 volumes have been added to the collection during the year closing December 1st. The aggregate number of books now in the library is 258,752 volumes, besides about 50,000 pamphlets. In the copyright department there have been 15,352 entries made during the year, and the Librarian has paid into the Treasury the sum of 13,404 dollars as the receipts from copyright fees. This exceeds the entries of the year preceding by about ten per cent. The rapid growth of the library and of the copyright business of the country renders a new building to accommodate the overflowing collections an imperative necessity. While retaining in the Capitol a sufficiently large library for legislative and judicial use, Congress has already authorized the preparation of plans for a separate building, and the Commission appointed to select a plan will shortly make the award of premiums. The site of the building, however, is not yet selected.

UNDER the title of the Verein für Deutsche Literatur, has been started at Berlin an association, which will issue new works by authors of repute to its members, on the payment of a small annual subscription. Among the writers who have promised their aid, are several well-known names: MM. Gutzkow, Bodenstedt, Bluntschli, Büchner, Von Sybel, P. Heyse, P. Lindau, M. Lehmann, Vambéry, and others. The Directors are Prof. Gneist, Count Usedom, &c.

THE Revue de Belgique has changed hands, and is now under the management of a Comité de Rédaction, composed of Messrs. Émile de Laveleye, Count Goblet d'Alviella, Baron Eugene van Bemmel and Ch. Potvin.

M. ABOUT, as our readers will learn from

his letter in another column, declares that the

name of the inconnue of Mérimée's letters is a

mystery not yet solved; still we may, perhaps, mention that current Paris gossip asserts, probably quite wrongly, that Miss Jenny probably quite wrongly, that Miss Jenny Dakin is the lady to whom the deceased author addressed this long correspondence.

SCIENCE

The Naturalist in Nicaragua, with Observations on Animals and Plants. By Thomas Belt. (Murray.)

MR. BELT is a mining engineer who superintended the operations of the Chontales GoldMining Company, in Nicaragua, from 1868 to 1872, a most irksome and anxious duty, with much attendant worry and responsibility, in consequence of the yield of the mines being just at that tantalizing point which lies between profit and loss.

The author is more of a geologist than a naturalist, and seems besides to have studied entomology to some purpose; but although an assiduous collector, he can hardly claim to be a naturalist in the more extended meaning of

the term, and is certainly no sportsman, being more familiar with the butterfly-net than with the rifle. It is not improbable that his professional duties at the mines prevented, to some extent, the pursuit of large game which abounds in the neighbourhood; but whilst great at hunting Coleoptera, Elateridæ, and Lamellicorns, our author appears never to have seen either tapir or deer; the word "puma" does not occur once in his pages, whilst the wild hog also escaped his shot; a passing glimpse of a jaguar is styled an adventure, and affords an excuse for the frontispiece.

A Darwinian and a follower in the footsteps of Messrs. Wallace and Bates, Mr. Belt takes the latter author as his model and guide; he certainly adds a considerable amount of new information to the general storehouse of facts, besides which he is prolific in new theories, geological, meteorological and hydrographical. And first as to his facts. With regard to the distribution of the bird Fauna; the depression of the Central American isthmus occupied by the Great Nicaraguan lakes and their outlet, the San Juan river, was formerly supposed to form the boundary between the Mexican and Costa Rican sub-provinces, but from Mr. Belt's collections of bird-skins, Mr. Salvin finds that there is a larger proportion of southern than northern species, and it now appears that the great break occurs in Honduras; the valleys of Humuya and Goascoran, with the plain of Comayagua, constituting a decided interruption, cutting completely through the chain of Cordil

leras.

"Hundreds of ants are to be seen running about, especially over the young leaves. If one of these be touched, or a branch shaken, the little ants swarm out from the hollow thorns and attack the aggressor with jaws and sting. These ants form a most efficient standing army for the plant, which prevents not only the mammalia from browsing on the leaves, but delivers it from the attacks of a much more dangerous enemy, the leaf-cutting ants.

For these services the ants are not only securely housed by the plant, but are provided with a bountiful supply of food."

So also we are told of plant lice, scaleinsects, and leaf-hoppers, which furnish ants with honey, and in return are protected by the latter. Mr. Belt concludes that in many instances "the use of honey-secreting glands in plants is to attract insects that will protect the flower-buds and leaves from being injured by herbivorous insects and mammals."

Perhaps the most interesting pages in this work are those which relate the various mimetic resemblances, not only between insects of different genera and orders, but between insects and flowers, leaves, twigs, and bark of trees, and between insects and inanimate nature. For instance, there is amongst the beetles a curious longicorn, closely resembling a common hairy caterpillar, a special protection against insectivorous birds. Again,

we have the moss insect, the larva stage of a species of phasma; and many species of Orthoptera and Pterochroza, which imitate leaves in every stage of decay. Many Chrysalides also have mirror-like spots that resemble holes through them, and one actually has a real hole through it.

"It is to be remarked that the forms

imitated have always some kind of defence against insectivorous birds or mammals; they are provided with stings or unpleasant odours or flavours, or are exceedingly swift in flight." Thus wasps and stinging-ants have hosts of imitators amongst moths, beetles, and bugs. On the other hand, nearly all the insects that possess special means of protection have conspicuous, strongly contrasted colours; and Mr. Wallace has shown that brightly banded caterpillars are distasteful to birds. Amongst mammals the skunk is conspicuously marked; and amongst reptiles the beautiful coral snake is noxious and avoided.

Mr. Belt dwells at great length on the social instincts of ants, which have been developed to an extraordinary degree of perfection. The leaf-cutting ants are well known, but much doubt has always existed as to the uses to which the leaves are put. "I believe the real use they make of them is a manure, on which grows a minute species of fungus on which they feed; that they are, in reality, mushroom growers and eaters."

A short account is given of the gold-mining in the Chontales district, which is confined almost entirely to auriferous quartz lodes, no alluvial deposits having been found that will pay the working. These lodes or veins run parallel to each other, and are so numerous that across a band more than a mile in width one may be found every fifty yards. The gold does not occur pure, but is alloyed with silver. On the hills near the outcrops of the lodes the ore is often exceedingly rich, which is apt to lead to an exaggerated opinion of their value. When, however, these deposits are followed downwards, they invariably get poorer to a certain depth, below which they do not de

"The cause of these rich deposits near the surface does not appear to me to be that the lodes originally before they were exposed by denudation contained more gold in their upper portions than below, but to be the effect of the decomposition and wearingdown of the higher parts, and the concentration of the gold they contained in the lode below that worn away. This accumulation of loose gold near the surface of auriferous veins, set at liberty from

its matrix by the decomposition of the ore, and concentrated by degradation, is probably the reason of the great richness of many of what are next the existing surface, and has also, perhaps, called the caps of quartz veins,—that is, the parts originated the belief that auriferous lodes deteriorate in value in depth."

A notice of a dust whirlwind gives rise to a short discussion of the cause of all circular movements of the atmosphere, including the cyclone :

"The conclusion I arrived at was, that the particles of air next the surface did not always rise immediately they were heated, but that they often remained and formed a stratum of rarified air next the surface, which was in a state of unstable stratum was able at some point where the ground equilibrium. This continued until the heated favoured a comparatively greater accumulation of heat to break through the overlaying strata of air and force its way upwards. An opening once made, the whole of the heated air moved towards it and was drained off, the heavier layers sinking down and pressing it out. . . . This explanation supplies the force that is necessary to drive the air with the great velocity with which it moves in whirlstorms. There is a gradual passage from the small dust eddies through large whirlstorms to tornadoes and the greatest cyclone."

A disciple of Agassiz, Mr. Belt finds traces of glacier action throughout modern America,

and believes that during this glacial period the sea must have stood at least 1,000 feet lower than it now does, laying bare the fabled Atlantis, the great continent "on which the present West Indian islands were mountains " in the Atlantic, and in the Pacific the Malay continent. It is there he looks for the refuge of those genera which now occupy tropical countries, then covered with ice and snow. A few remarks on the archæology of the district, and a slight notice of the ethnology of the Mexican, Western Central American, and Peruvian races, whom he includes under the title of Nahuatls, in contradistinction to the Caribs, whose original seat he places in his favourite Atlantis, are not uninteresting.

To Mr. Bates, who saw this work through the press, we are probably indebted for a good index; but we are surprised that the sketch-map at the end of the volume is not better thus, Juigalpa, "one of the principal towns of the province of Chontales," is altogether omitted.

Altogether, this unpretending volume cannot fail to interest a large proportion of the reading public, besides those more especially engaged in scientific investigations connected with economic entomology.

SCIENCE SCHOOL-BOOKS.

1. Light.-2. Heat.-3. Electricity.-4. Magnetism.-5. Chemistry.-6. Pneumatics and Acoustics. By J. H. Pepper. (Warne & Co.) HERE we have six books written to elucidate as many of the great divisions of scientific knowledge by the same author. Surely his must be really a Polytechnic mind. We have examined these books with care, and although, from a cursory glance at their pages, and their popular illustrations, we were, at first, disposed to regard them as mere attempts to make science a plaything, we soon became convinced that some of them rise superior to the ordinary run of text-books; and that although the descriptions of striking phenomena were alluringly written, yet that their philosophy in sport was science in real earnest. There is no doubt but that the experience gained by Mr. Pepper during the many years of his reign at the Polytechnic institution, where he was constantly em

ployed in explaining to the public all that was new in science, has given him wonderful facility in describing, so as to be understood by all, the more abstruse phenomena of Light, Heat, and minds of his readers, as of his listeners, the proElectricity, and of bringing clearly before the cesses of chemical change and the results of analytical and synthetical investigation. The volume on "Light" of the above series is a remarkable example of this. It may be read by the young inquirer with interest, and from every page he will derive much instruction. The laws regulating the reflexion and refraction of light are satisfactorily given, and the resulting phenomena well illustrated by diagrams and other woodcuts. The more abstruse but beautiful effects produced by the polarization of light are popularized, and

66

the truth is not sacrificed in doing so, while the sufficiently explained, so as to render this system of conditions of spectrum analysis are concisely, yet investigation intelligible to all who read with care. "Electricity" has been for so long a period one of the stock branches of science at the Polytechnic, that the author is perfectly at home in describing the experimental illustrations of the discoveries in this division of science, embracing "Magnetism." "Heat" is not so satisfactorily treated. arises very evidently from the fact that the phenomena of heat do not admit of being so readily, so strikingly, exhibited to an audience, and hence on the part of our author an evident want of familiarity with his subject. "Pneumatics" and "Acoustics," for the very reason we have just

This