CVl 



NATURE 



[Feb. 6, 1879 



MICROSCOPIC OBJECTS 



OC •aperladve perfection, illustrating Histology and every branch of Micro- 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Medal awarded for Excellence, Variety, ^c. 

 EDMUND WHEELER. 48w, Tollington Road. Holloway. London, N. 



TUITION for the UNIVERSITIES and 



ARMY. — Non-resident Pupils received for Individual Instruction by a 

 Private Tutor. — Address Tutor, 8, Gloucester Terrace, Onslow Gardens, 

 S.W. 



ROYAL INSTITUTION OF GREAT 

 BRITAIN, 



ALBEMARLE STREET, PICCADILLY, W. 



Prof. TYNDALL, D.C.L., LL.D., will, on THURSDAY next, Feb. 13, 

 at 3 o'clock, begin a Course of Eight Lectures on " Sound, including its 

 Recent Applications and Methods of Reproduction." 



Subscription to this Course, One Guinea ; to all the Courses in the Season, 

 Two Guineas. 



NEW ATHEN>EUM CLUB 



FOR GRADUATES OF UNIVERSITIES AND MEMBERS OF 



SCIENTIFIC SOCIETIES. 



The SECOND 500 MEMBERS are now being ADMITTED. 



J. LOGAN LOBLEY. Secretary. 

 26, Suffolk Street, Pall Mall, S.W. 



'WANTED, GOOD 3-inch ACHROMATIC 



by Cooke.— Address S. J., Office of Nature, 29, Bedford Street, 

 Strand. 



ROYAL SCHOOL OF MINES. 



Professor Goodeve, M.A., will commence a course of Thirty-six 

 Lectures on " Applied Mechanics" on MONDAY next, the loth February, 

 at Ten o'clock, to be continued on every week-day but Saturday, at the 

 same hour. Fee for the Course, £,j,. 



Mr. Warington W. Smyth, M.A., F.R.S., will commence a course of 

 Forty Lectures on "Mineralogy" on MONDAY next, the loth February, 

 at Noon, to be continued on each succeeding Tuesday, Thursday, Friday, 

 and Monday, at the same hour. Fee for the Course, £^. 



Professor JuDD, F.R.S., will commence a Course of Fifty Lectures on 

 *' Geology " on MONDAY, the 17th February, at Ten o'Clock, to be 

 continued on every week-day but Saturday, at the same hour. 



Fee for the Course, £^ ; for practice in Laboratory and Field, £6, in 

 addition to the lecture fee. 



N.B. — The Courses on Applied Mechanics and Geology will be given at 

 South Kensington. 



TRENHAM REEKS, Registrar. 



SUNDAY LECTURE SOCIETY.— LEC- 



TURES at ST. GEORGE'S HALL, Langham Place, each SUNDAY 

 AFTERNOON, commencing at Four o'clock precisely. Sunday, 

 February 9. — Lawson Tait, Esq., on " The Method Employed for the 

 Fertilisation of Flowers, and the Relation of Insects to Plants." With 

 Oxyhydrogen Lantern Illustrations. — Members'Annual Subscription,;^!. 

 Payment at the Door — One Penny, Sixpence, and (reserved seats) One 

 Shilling. 



BERNERS COLLEGE.— The Laboratory 



and Class Rooms are open for Private and Class Study, morning and 

 evening. ANALYSES performed. Especial arrangements for Gentle- 

 men and Ladies preparing for the various Examining Boards. Fees 

 moderate. — Apply to Prof. Gardner, at Bemers College, 44, Bemers 

 Street. W. 



The LOMBE TAYLOR COLLECTION of 



SHELLS.— This is undoubtedly the largest private Collection in the 

 world. The late proprietor, during fifty years preceding his death, lost 

 no opportunity of acquiring specimens, besides purchasing several entire 

 collections, notably that of Gaskoin, and the greater part of the shells 

 collected in the voyages of the Sulphur and the Satnarnng. The entire 

 cost of the collection was about ;fi 7,000. The above celebrated Collec- 

 tion is now placed for sale in the hands of G. B. Sowerby, and may be 

 seen, and selections made, on and after WEDNESDAY, February 12th, 

 between the hours of 10 and 4, at 45, Great Russell Street, London, 



DIAMONDS IN MATRIX. 



R. C. NOCKOLD, Diamond and Oriental Stone Cutter and Dealer, has 

 f 01 sale Specimens of the above ; also Cut Precious Stones in all Colours. 

 12, FRITH STREET, SOHO, W. 



ROYAL POLYTECHNIC— CLASSES for 



the preparation of Students for University Examinations, under the 

 direction of EDWARD B. AVELING, D.Sc, F.L.S. London Uni- 

 versity Matriculation, ist and 2nd B.Sc, PreUminary Scientific M.B., 

 Botany, Physiology, Chemistry. All the work pracUcal. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET, BIRMINGHAM, 



T. B. has last week posted to his subscribers a tube of water rich in 

 Infusoria and Diatoms. He has also been sending out Trout Spawn, 'show- 

 ing circulation of the blood in the embryo, and on the yolk-bag, Spongilla, 

 Stentors, Closterium lunula, Qicistes, Hydra, Stephanoceros, Philodina, 

 Nitella, &c. 



Weekly announcements will be made in this place of organisms T. B. 

 is supplying. 



Price List of Specimens on application, with Stamped Addressed 

 Envelope. 



ELECTRICAL & SCIENTIFIC APPARA- 

 TUS for AMATEURS and the TRADE.— Microphones of every form, 

 from IS. 6d. New cheap Electric Lamps and Batteries. Induction 

 Coils and Frictional Machines are specialties. Electrical Bells, Fire 

 and Thief Alarms, and Automatic Switch-boards. Magnets, Covered 

 Wires, Screws, and all Materials. Apparatus for Science Teacbers. 

 Illustrated Catalogue, one stamp. Repairs and Alterations. Appara- 

 tus made to sketch.— DALE & CRAMPTON, Manufacturing Elec- 

 tricians, 4, Little Britain, E.C. 



COLLECTION OF FOSSILS FROM 



HEADON SERIES, Isle of Wight; 40 Species, 200 odd Specimens, 

 cleaned and named. — Address J. W. Elwe?, Otterbourne, Winchester. 



The LANCASTER ELECTRIC LAMP, de- 

 vised by W. J. LANCASTER, F.C.S., F.R.A.S., &c., in three sizes. 

 No. I, to bum 3 hours, £223.; No. 2, to burn 6 hours, £^ y. ; largest 

 sire, £s ss. Set of 20 Quart Bunsen's Cells, £^ 45. Model Electric 

 Lamp and 10 Cells, £2 12s. dd. 



HOW to MAKE a TELESCOPE, a MICRO- 



SCOPE. and a MAGIC LANTERN. How to TAKE a PHOTO- 

 GRAPH and PRINT aCARTE, see ILLUSTRATED CATALOGUE, 

 now ready, 3 stamps. Containing full direction for above, and how to 

 TRANSFER LANTERN SLIDES. 



J. LANCASTER & SON, Bull Street, Birmingham. 



The ELECTRIC LIGHT.— An Experienced 



Lecturer on this subject is open to ENGAGEMENTS in any part of 

 the country. The lecture would be illustrated by all the recent forms 

 of regulators, with the help of a large battery or dynamo machine, as 

 may be arranged. — Apply to Scienxe, care of Edward Paterson, 3, 

 Bedford Court, Covent Garden, London. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Circles, y. td. per ounce ; Squares, 

 2S. gd. ; post free 2d. extra ; Ground-edged Slips, y. per gross : also 

 other Mounting Materials and Objects prepared for mounting.— CHAS. 

 PETIT, 151, High Street. Stoke Newington, N. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



Packages for the General Library, or for any of the Departmental 

 Libraries (Ai^tronamical Observatory, Botanic Garden, Bussey Institution, 

 Bfriaity School, Law School, Museum of Comparative Zoology, Scientific 

 School), aay be seat to the Agents, Messrs. TrCbner & Co., 57 and 59, 

 Ludgate HiU, London. 



jy^TIN WINSOR, Librarian. 



EOZOON CANADENSE. 



JAMES R. GREGORY has just received a large number of very fine 

 Specimens of the above, at all prices ; also Sections of the same, cut fi r 

 the microscope. Price of Specimens polished, 5^., lOJ., and upwards. . 

 Microscopic Sections, post free, 2s. 2d. each, of 



JAMES R. GREGORY, 

 GEOLOGICAL MUSEUM, 



SS, CHARLOTTE STREET, FITZROY SQUARE, 



LONDON. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Shhernkss-on-Sea, respectfully intimates that 

 the appeal recently made by him has been so heartily responded to, that he 

 cannot receive any more orders for " extra selected " specimens at present. 



Orders for loj. Collections of 100 "good" specimens can be executed 

 without delay. 



'; NOTES ON THE GEOLOGY OF SHEPPEY" post free on appli- 

 cation. 



SCIENTIFIC PRESENTS. 



Collections of FOSSILS, ROCKS, or MINERALS, arranged in Walnut 

 stuned and polished Cabinets with Lock and Key. Size of Specimens, 

 2 square inches. 100 Selected, 2ar. 200 Selected, 40^. 

 Catalogue free. 

 •»* No charge for packing. Carriage free to all parts of Great Britain. 

 "THE POPULAR SCIENTIFIC POCKET CABINET SERIES,'* 



(Second Edition.) 



Gems, Minerals, Metals, Fossils, Rocks, Shells, &c., &c. as Specimens 



in Cabinet, 2S. lod. carriage paid. 



THOMAS J. DOWNING (MINERALOGIST), 



38, WHISKIN STREET, LONDON, E.C. 



