Iviii 



NATURE 



{Dec. 26, 1878 



MICROSCOPIC OBJECTS 



■Of fuperlative perfection, illustrating Histology and every branch of Micro- 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Midal awarded for Excellence, Variety, ^c. 

 EDMUND WHEELER, 48N, Tollington R oad. Holloway. London. N. 



CHRISTMAS LECTURES. 



ROYAL INSTITUTION OF GREAT 



BRITAIN, 



ALBEMARLE STREET, PICCADILLY, W. 

 Prof. DEVVAR, M.A., F.R.S., will deliver a Course of Six Lectures 

 (adapted to a Juvenile Auditory), on "A Soap Bubble :" commencing on 

 Saturday next, December 28, at 3 o'clock ; to be continued on December 

 31, 1878 ; and January 2, 4, 7, q, 1879. 



Subscription to this Course, One Guinea (Children under Sixteen, Half-a- 

 Guinea) ; to all the Courses in the Season, Two Guineas. Tickets may now 

 be obtaine d at the Institution. 



PR Etl M1J7ARY"SCIENTIFIC EXAMINATlT^ 



UNIVERSITY OF LONDON. 



A Class in all the subjects for this Examination is held at St. Bartholo- 

 mew's Hospital and College from January to July, commencing en 

 January 20. 



The Class is open to others than Students of the Hospital. Fee for the 

 entire Course (including practical instruction and nr.ater.als)— To Students 

 of the Hospital, ;£8 Zs. ; to others, ^10 lor. 



For particulars, application may be made personally or by letter to the 

 Warden of the College, St. Bartholomew's Hoi-pital, E C. 



~ UNIVERSITY OF LONDON. 



1ST M.B. AND PRELIMINARY SCIENTIFIC EXAMINATIONS. 



Classes in all the subjects required are now being formed at St. Thomas's 

 Hospital Medical School, which are not confined to Students cf the 

 Hospital. 



For particulars ap ply to Dr. Gill espie, Secretary, at the Hospital. 



MATRICULATION.— LONDON 

 UNIVERSITY. 



Six months' Course. Fee, ^10 105. 



1ST BACHELOR OF SCIENCE and PRELIMINARY SCIENTIFIC 

 M.B. Six months' Course. Fee, ;^io los. 



The above Classes will commence .it the Royal Polytechnic, Regent 

 Street, in January next, under the direction of Edward B. Aveling. D. Sc, 

 F.L.S. All work practical. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 December 29.— Andrew Wilson, Esq., Ph.D., F.R.P.S E. , Lecturer on 

 Zoology and Comparative Anatomy in the Edinburgh Medical School, 

 &c., on " The Origin of Nerves." Illustrated wkh numerous Diagrams. 

 Members' Annual Subscription,^!. Payment at the Door — One Penny, 

 Sixpence, and (reserved seats) One Shilling. 



UNIVERSITY COLLEGE, LONDON. 



FACULTY OF MEDICINE.— The Classes will re-commence on 

 Monday, January 6. 



FACULTIES OF ARTS AND LAWS (including the Department of 

 the Fine Arts) AND OF SCIENCE.— The Second Term will commence 

 on Tuesday, January 7. 



SCHOOL FOR BOYS between the ages of Seven and Sixteen.— The 

 Lent Term will begin on Tuesday, January 14. 



Prospectuses may be obtained from the Office of the College. 



TALFOURD ELY, M.A., Secretary. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



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

 Libraries (A^tronoraical Observatory, Botanic Garden, Bussey Institution, 

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

 School), may be sent to the Agents, Messrs. TRtjBNER & Co., 57 and 59, 

 Ludgate Hill, London. 

 JUSTIN WINSOR, Librariap. 



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, Berners 

 Street. 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 and B.Sc, Preliminary Scientific M.B., 

 Botany, Physiology, Chemistry. All the work practical. 



WIT HERNDEN SCHOOL, CATERHAM 



VALLEY, SURREY.— Principal, Mr. C. H. LAKE, B.A. Lond. (in 

 Honour s). Edu cati on on Natural Principles. A limited number of Pupils . 



ON SALhT^A Rare Opportunity.— Lot i. 



The Works of the Palae^ntographical society complete from 1847; excel- 

 lent condition ; 13 vol?., half -bound cloth and kid. What offers ? Lot 2. 

 A good Collection of Limestone Fossils collected in Westmoreland. — 

 Afiply T. R. Claiha.m, Clapham, Lancaster. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



IHOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET BIRMINGHAM. 

 RAPHIDIOPHRYS PALLIDA, 



The Freshwater Rhixopoda of F. Schulze figured in Archiv fiir 

 mikroskoj). Anatomic, vol. x. Plate xxvi. fig. i. 



An interesting marine organism which Prof. E. Ray Lankester has recog- 

 n;sed as an embryo of the Polyzoa, Alcyonidiuin. 



Also !• loscules, some fine Meliceria ringens, and Vohox glolator, &c. 



Tir* I'f* °^ Specimens on Application, with Stamped Addressed Envelope. 



Weekly Announcemenu will be made in this place of Organisms ready 



TELESCOPE for SALE.— A Fine Instru- 



ment, 3? Objective, on Par.-il!ac; Ic Stand of great strength and firmness. 

 Screw motions ; several powt rs ; in perfect condition. Price £,i^. 

 Shows companion to Rigel, &c.— Address Polaris, Office cf Nature, 

 Bedford Street, Covent Garden, London. 



THIN GLASS FCjR MICROSCOPIC 



MOUNTING, of best quality. Circles, 3J. td. per ounce ; Squares, 

 2J. <jd. ; post free 2^. extra ; Ground-edged Slips, 5^. per gross : also 

 other Mounting Materials and Objects prepared for moumine.-CHAS. 

 PETIT, isi, High Street. Stoke Newington. N. ^ 



ELECTRICAL & SCIENTIFIC APPARA- 



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

 from \s. 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 Teachers. 

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

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

 tricians, 4, Little Britain, E.C. 



GEOLOGY.— In the PreTaee to the Student's 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, price gj., he says : 

 — "As it is impossible to enable the reader to recognise rocks and mine- 

 rals at sight by aid of verbal descriptions or figures, he will do well to 

 obtain a well arranged collection- of specimens, such as may be procured 

 from Mr. TENNANT (149, Strand), Teacher of Mineralogy at King's 

 College, London." These Collections are supplied on me following 

 terms, in plain Mahogany Cabinets : — • 



100 Specimens, in Cabinet, with 3 Trays ... .^ ... £i a e 

 200 Specimens, in Cabinet, with 5 Trays ... ... ...550 



300 Specimens, in Cabinet, with 9 Drawers 10 10 o 



400 Specimens, in Cabinet, with 13 Drawers 21 • o 



More extensive Collections at 50 to 5,000 Guineas each. 



tOZoON 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 for 

 the microscope. Price of Specimens polished, 5J., xos., and upwards. 

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



JAMES R. GREGORY, 



GEOLOGICAL MUSEUM. 



88, CHARLOTTE STREET, FITZROY SQUARE, 



LONDON. 



SCIENTIFIC CllRISTMAS PRESENTS! 



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

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

 2 square inches. 100 Selected, 20s. 200 Selected, 401. 

 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, Kocks, Shells, &c., &c. 25 Specimens 



in Cabinet, is. jod. carriage paid. 



THOMAS J. DOWNING (MINERALOGIST), 



38, WHISKIN STREET, LONDON, E.C. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Sheerness-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. 



MICROSCOPIC OBJECTS. 



Horn Sections, Blood Discs, Feathers, Hairs, Sections of Bone and Teeth, 

 Fish Scales, Anatomical Preparations from the Human Subject and Lower 

 Animals, Palates of Mollusca, Sections of Shells and Pearls, Polyzoa, whole 

 Insects, Parasites, parts of Insects, Ossicula, Spines, &c., of Echinoder- 

 mata, Spicules of Sponges and Gorgonias, Foiaminifera, Botanical Prepara- 

 tions, Diatomace«e, Salts, CrysL^s, Sections of Rocks, Fossils, Alinerals, 

 &c. 



Ochreous Iron in Moss-like Forms in Calcite, ts- 6d. post-free. 



Stellar Mica, or Canadian Phlogopite, is. ^d. post-fi-ee. 



Catalogues free. 



THOS. D. RUSSELL, 



48, ESSEX STREET, STRAND, LONDON, W.C. 



DIAMONDS AND OTHER PRECIOUS 



STONES. Scientific opinion given as to PURITY and VALUE.— 

 Bryce VVkight, 90, Great Russell Street, London, W.C. 



