MESSRS. MACMILLAN & CO.'S NEW AND RECENT SCIENTIFIC BOOKS. PROF. BARKER.-PHYSICS: ADVANCED COURSE. BY GEO. F. BARKER, Professor of Physics in the University of Pennsylvania. 8vo, 21s. NATION:-" The arrangement of subjects treated and the names given them make the work specially noteworthy as an exponent of modern views in physics. While these views are not in themselves new, they here form what we believe is essentially a new classification of the subject for purposes of study and instruction, based on the most recent views of energy considered as being ultimately a phenomenon of the aether. . . . The work deserves hearty praise for its fulness, its thoroughly modern spirit, its clearness, and a certain freshness in the treatment which adds to its real value as well as to its attractiveness.' MR. FOR ADVANCED STUDENTS IN ELECTRICITY. O. HEAVISIDE-ELECTRICAL PAPERS. By OLIVER HEAVISIDE. 2 vols., 8vo., 30s. net. MANCHESTER GUARDIAN:-"One is struck in looking through these papers by the author's acquaintance with higher mathematics, and the ease with which he introduces and deals with functions like those of Bessel, the properties of which are little known even to mathematicians of high attainments." NEW AND ENLARGED EDITION. MR. D. E. JONES.-EXAMPLES IN PHYSICS. By D. E. JONES, B.Sc. late Professor of Physics in the University College of Wales, Aberystwith. Second Edition, Revised and Enlarged. 18mo. 3s. 6d. "The present edition," says the author in the Preface, " has been carefully revised, and some sixty pages of additional matter have been added. The examination questions at the ends of the chapters have been replaced by new sets of problems from recent papers." PROF. HOSKINS.—THE ELEMENTS OF GRAPHIC STATICS. A TextBook for Students of Engineering. By L. M. HOSKINS, Professor of Pure and Applied Mathematics in the Leland Stanford Junior University, formerly Professor of Mechanics in the University of Wisconsin. 8vo, 10s. net. GLASGOW HERALD:-"The definitions are well put, and the whole discussion of the subject is quite satisfactory.. It will be found of great value, both in facilitating the work of the student, and, on account of its consistent notation, in guarding the draughtsman against mistakes." SCOTSMAN:—“ The book is clear and explicit. It should serve admirably as an elementary text-book for students of engineering." THE SECOND VOLUME OF PROF. GRAY'S WELL-KNOWN WORK. PROF. GRAY-THE THEORY AND PRACTICE OF ABSOLUTE MEASUREMENTS IN ELECTRICITY AND MAGNETISM. By ANDREW GRAY, M.A., Professor of Physics in the University College of North Wales. Vol. II., in two Parts, 8vo, 25s. Vol. 1., already published, price 12s. 6d. “I have given, in this second volume," Prof. Gray explains in his Preface, "accounts of experimental investigations in which F have tried to place before the reader, not merely a skeleton of the method followed and the result arrived at, but such a statement in each case as may serve to show the procedure adopted, the difficulties met with. the mode in which they were overcome, the corrections made, and the reduction of the observations to the final result. Thus I have described the researches of Lord Rayleigh, Rowland, J. J. Thomson, and others, on the absolute measurement of currents, the determination of the ohm and of v, the practical' methods of testing and measurement devised by Hopkinson, Ayrton, Perry, and other engineers, the magnetic researches of Hopkinson and Ewing, and the discoveries of Hertz in electrical radiation. In all cases it has been my aim, avoiding really unimportant detail, to describe the events of the investigation, and especially the manner in which practical difficulties were met as they arose; for in this way only is it possible I think to learn fu ly the true lessons of physical experimental science. This plan of proceeding has however rendered the matter, though compressed as far as possible, almost too extensive for a single volume." NEW BOOK BY PROF. OLIVER LODGE. PROF. LODGE.-PIONEERS OF SCIENCE. BY OLIVER LODGE, F.R.S., Professor of Physics in the Victoria University College, Liverpool. With Portraits and other Illustrations. Crown 8vo. 7s. 6d. Extra A course of lectures on the lives of epoch making men, principally in the Department of Astronomy, giving an account of their work, and tracing their influ-nce on the development of human thought. The first part of the course, called "From Dark to Daylight," consists of nine le tures on the men from Copernicus to Newton, especially Tycho, Kepler, Galileo, Descartes, and aims at explaining the scientific aspect of their work in a clear and intelligible manner with copious illustrations. The second part of the course consists of nine lectures on such subjects as the Vlocity of Light, Herschel and the Stars, the discoveries of Asteroids and of Neptune, Comets, and Meteors, and the Tides, with some biographical details, and much scientific exposition addressed to persons of literary education. NATIONAL OBserver.—“The present work is in marked contrast with most popular science; it is accurate, yet it is gracefully written." NATURE.-"An admirable introduction to the study of astronomy, and no better gift for a beginner could well be chosen ; while to those to whom many of its details are already familiar, the picturesque clearness with which they are presented will make their knowledge more real and more complete. The standard of excellence maintained in the lectures makes distinction difficult and invidious, or we would distinguish the lectures on Newton and those on tides as models of what such popular scientific expositions should be." MACMILLAN AND CO., LONDON. TO H.R.H. THE PRINCE OF WALES, THE EMPRESS OF GERMANY, &c. Bacillus Typhi Abdominalis Bacillus of Diphtheria (Loffler) False Membrane from a Child Mildew in Stem of Wheat (Puccinia graminis) Fertile Spike of Chara Fungus on Leaf of Potato (Peronospora infestans) Group of 12 different Species of Foraminifera on one Slide, very Stem and Petiole of Virginia Creeper, showing defoliation £ s. d. Protonema of Moss O I O O 1 O Type-slide of 400 different Species of Diatoms, the name photo- CLASSIFIED LIST, representing a Stock of 40,000 First-class Objects sent post free on application. WATSON & SONS' TRIPOD EDINBURGH STUDENT'S MICROSCOPE is suitable for investigations with the highest powers. The quality and W. WATSON & SONS, OPTICIANS TO HER MAJESTY'S GOVERNMENT, COCOA 60 Prize Medals Awarded to the Firm. BE CAREFUL TO ASK FOR FRY'S PURE CONCENTRATED COCOA. Printed by RICHARD CLAY AND SONS, LIMITED, at 7 and 8 Bread Street Hill, Queen Victoria Street, in the City of London, and Published by MACMILLAN AND Co., at 29 Bedford Street, London, W.C., and 112 Fourth Avenue, New York.-THURSDAY, April 13, 1893 J NEW CATALOGUE OF LANTERNS AND SLIDES, JUST PUBLISHED, 6d. POST FREE, Contains NEW SETS OF LANTERN SLIDES on HISTOLOGY. (Photo-micrographs.). AGRICULTURAL BOTANY. (Photo-micrographs.) PROJECTING MICROSCOPES PROJECTING POLARISCOPES, NEWTON & CO., (BY SPECIAL APPOINTMENT TO THE ROYAL INSTITUTION) 3 FLEET STREET, LONDON. NOW READY.-1s., Post Free. GRIFFIN'S ILLUSTRATED CATALOGUE 16 RED LION ST., CLERKENWELL, LONDON, E.C. Telegraphic Address, Secohm, Lonaon. Telephone No. 6770. Ayrton Mather D'Arsonval Galvanometer. ELECTRICAL AND SCIENTIFIC INSTRUMENT MAKERS. PRICED ON APPLICATION. STANDARD METEOROLOGICAL INSTRUMENTS ow ready, Negretti & Zambra's Encyclopædic Catalogue of Mathematical, Philosophical, Optical, and Standard Meteorological Instruments, containing numerous Comparative Tables of Reference, and Illustrated by Twelve Hundred Engravings, Royal Bro, Cloth, Gilt Lettered, price 5s. 6d. NEGRETTI & ZAMBRA, Opticians and Scientific Instrument Makers To Her Majesty the Queen, HOLBORN VIADUCT, 45 CORNHILL, & 122 REGENT STREET, LONDON. PRICE LISTS FREE BY POST TO ALL PARTS OF THE WORLD. GUY'S HOSPITAL MEDICAL SCHOOL. The SUMMER SESSION begins on MONDAY, MAY 1. The Hospital contains 695 beds, of which 500 are in constant occupation. Special Classes are held for Students preparing for the Examinations of the University of London and other Higher Examinations. APPOINTMENTS.-All Hospital Appointments are made strictly in accordance with the merits of the Candidates, and without extra payment. ENTRANCE SCHOLARSHIPS in September 1893.-Two Open Scholarships in Arts, one of the Value of £100, open to Candidates under 20 Years of Age; and one of £50, open to Candidates under 25 Years of Age. Two Open Scholarships in Science, one of the Value of £150, and another of £60, open to Candidates under 25 Years of Age. PRIZES are awarded to Students in their various years, amounting in the aggregate to more than £550. DENTAL SCHOOL. A Dental School is attached to the Hospital which affords to Students all the instruction required for a Licence in Dental Surgery. COLLEGE.-The Residential College accommodates about Fifty Students in addition to the Resident Staff of the Hospital, and contains a large Dining Hall, Reading Rooms, and Gymnasium, for the use of the Students' Club. For Prospectus and further information apply to the Dean, Dr. SHAW, Guy's Hospital, London, S. E. ST. THOMAS'S HOSPITAL MEDICAL SCHOOL, ALBERT EMBANKMENT, LONDON, S.E. The SUMMER SESSION will commence on MONDAY, MAY 1. Students entering in the Summer are eligible to compete for the Science Scholarships of £150 and £60 awarded in October. There are Prizes and Scholarships of the value of £300. All Appointnients are open to Students, without extra charge. Special Classes for the Examinations of the University of London are held throughout the year. A Register of approved lodgings, and of private families receiving Boarders, is kept in the Secretary's Office. Prospectuses and all particulars may be obtained from the Medical Secretary, Mr. G. RENDLE. COUNTY BOROUGH OF CARDIFF APPOINTMENT OF CURATOR AND SECRETARY. The Museum Committee of the County Borough of Cardiff require the services of a CURATOR of the Museum and Art Gallery, who will also act as SECRETARY to the Committee. The gentleman app inted will be required to devote the whole of his time to the duties, and must be competes: to Catalogue the contents of the Museum and Art Gallery, and to cola Specimens for the Museum. The Salary will commence at £200 per annum, rising by annual incrementa of £10 to £250 per annum. Preference will be given to Applicants who have previously held Office in a Museum. The person appointed will be required to enter upon his Dans SCHOOL OF SCIENCE. PENYWERN HOUSE, 2 PENYWERN ROAD, EARL'S PRINCIPAL-G. W. DE TUNZELMANN, B.Sc., M.I.E.E. The Complete Courses qualify Students for entry into Electricaler other Engineering Works. The First Year's Course is arranged to qualify Students for enterier Cooper's Hill, the Central Institution Engineering College, or the Roya School of Mines. Forty one Students have entered these Institutions during the la three years, and two Entrance Scholarships have been obtained at the Central Institution. The College is provided with very complete Laboratories and Dynatas room, and also with an extensive Geological Collection for the Preliminary Courses for Civil and Mining Engineering Students. Students are regularly sent to the College by Leading Engineers and Scientific Authorities, whose Names are given in the Prospectus. Sale by Auction. TUESDAY, APRIL 25. THE VALUABLE COLLECTION OF EXOTIC LEPIDOPTERA FORMED BY A. DICKSEE, ESQ. MR. J. C. STEVENS will Sell by Auction at his Great Rooms, 38 King Street. Covent Garden, on l'UESDAY, APRIL 25, at half past 12 precisely, the very Select and Valuable Collection of Exotic Butterflies belonging to Arthur Dicksee, Esq. who is giving up collecting, comprising many Rare Species, especially rich in Ornithoptera. Papilio and Morplio, and in exceptionally fine and perfect condition, together with the Cabinet Drawers and Boxes in which they are arranged. Also a small series of fine bred specimens of P. Dispar and other British Lepidoptera, Insects in Papers, Shells, Minerals, and other Natural History Specimens, Cabinets, &c. On View day prior, 10 till 4, and Morning of Sale, and Catalogues had. COLLECTIONS OF MINERALS, ROCKS, OR FOSSILS, For the Use of Students, Science Teachers, Prospectors, &c., and to illustrate the leading Text-books, in Boxes, with Trays. 50 Specimens, 10s. 6d.; 100 do., 21s.; 200 do., 42s. New Price List of Minerals, Rocks, and Stratigraphical Seriesof Fossils Post Free. ROCK SECTIONS for the MICROSCOPE from 13. 6d. each, Post Free CATALOGUES GRATIS. CABINETS, GLASS-CAPPED BOXES, TRAYS, HAMMERS, &c. always in Stock. THOMAS D. RUSSELL, 78 NEWGATE STREET, LONDON, E.C. JAMES R. GREGORY, MINERALOGIST AND GEOLOGIST. SPECIAL AND TYPICAL COLLECTIONS for Students, EVERY REQUISITE FOR PRACTICAL WORK, also F. H. BUTLER, M.A. Oxon., Assoc. R. S. Mines. NATURAL HISTORY AGENCY, 158 BROMPTON ROAD, LONDON. Dealer in Rocks, Minerals, Fossils, and other Objects of Scientific Interest. Collections of Rocks, Minerals, Fossils, or Recent Shells furnished in accordance with special requirements. SCHOOL COLLECTIONS of Sedimentary and Igneous Rocks, 35 specimens of fair size in case with divisions, Rabbits and other objects for Biological Study supplied. Card Trays and Glass-topped Boxes of any required dimensions made promptly to order. Sections of Shells and general Lapidary's Work executed. Micro RockSlides new to stock-Schistose Elæ lite- Syenite, Norway; Dolerite, Rowley; Porphyritic Pitchstone, Beinn Shiant; and Sanidine Trachyte, Gleichenberg. MINERALOGY. SAMUEL HENSON, 97 REGENT STREET, LONDON, W. ESTABLISHED 1840. Late 277 STRAND Choice Mineral Specimens, Gem Stones, Carved Opals, Polished Agates, Rock Crystal Balls, Fossils, Rocks, and Rock Sections. LATEST ARRIVALS. Mr. HENSON has just received some good Groups of Japanese Stibnite. interesting Quartz Crystals inclosing Rutile and other Substances, and a Very Fine Rock Crystal Ball, 4 inches diameter, perfectly free from flaws, small Crystal Balls, with inclosures, Rock Crystal Carvings. &c., &c.; Crystallised Hydrargillite, Bertrandite, Polybasite, Diamonds, Chalcotrichite, Arizona, Yellow Terminated Beryls, Geikielite, and Yttrotantalite. Diatomaceous Earth from Hakodati. Japan. ALBERT EDWARD JAMRACH (Late CHARLES JAMRACH), NATURALIST, 180 ST. GEORGE STREET EAST. Implements of Savage Warfare, Idols, Sacred Masks, Peruvian Pottery, Netsukis, China, Lacquer, Gongs, Shells, and other Curios. LIVING SPECIMENS FOR THE MICROSCOPE. Volvox globator, Epistylis flavicans, Stentor caeruleus, Spongilla fluviatilis, Brachionus pala. young Colonies of Cristatella mucedo, and other beautiful objects Amoeba, Hydra, Vaucheria, and other types (Animal and Vegetable) for Students. Specimen Tube, with Drawing and Description. One Shilling, Post Free. TO ALL PLACES ABROAD: Quarterly £ s. 18 0 d. 0 14 6 O 7 6 Money Orders payable to MACMILLAN & CO. for OFFICE: 29 BEDFORD STREET, STRAND, W.C. |
