XVI 



NATURE 



\_7an, 2, 1879 



MICROSCOPIC OBJECTS 



Of inperlative perfection, illustrating Histology and every branch of Micro- 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize J\ledal azvarded for Excellence, Variety, &-r. 



EDMUND WHEELER, 48N, Tollineton Road. HoUoway, London, N. 



PRELIMINARY SCIENTIFIC EXAMINATION. 



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 (.ncluding pracirical instruction and materials) — To Students 

 of the Hospital, £S Ss. ; to others, ^^lo 10s. 



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

 Warden of the College, St Bartholomew's Hospital, E C. 



UNIVERSITY OF LONDONr" 



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 of the 

 Hospital. 



For particulars apply to Dr. Gillespie, Secretary, at the Hospital. 



MATRICULATION.— LONDON 

 UNIVERSITY. 



Six months' Course. Fee, ;{Jio loj. 



1ST BACHELOR OF SCIENCE and PRELIMINARY SCIENTIFIC 

 M.B. Six months' Course. Fee, ;{^io 10s. 



The above Classes will commence at the Royal Polytechnic, Regent 

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

 F.L.S. All work practical. 



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 Art?) AND OF SCIENCE.— The Second Term will commence 

 on Tuesday, January 7. 



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

 L.ent Term will begin on Tuesday, January 14. 



Prospectuses may be obtained from the Office of the College. 



TALFOURD ELY. M.A.. Seo-cfnry. 



ON 



SALE. — A Rare Opportunity. — Lot i. 



The Works of the Palaeontographical Society complete from 1847; excel- 

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

 A good Collection of Limestone Fossils collected in Westmoreland. — 

 Apply T. R. Clapham, Clapham, Lancaster. 



TELESCOPE for SALE.— A Fine Instru- 



raent, $1 Objective, on Parallactic Stand of great strength and firmness. 

 Screw motions; several powers; in perfect condition. Price £2$. 

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

 Bedford Street, Covent Garden, London. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 i January 5. — Benjamin W. Richardson, Esq., M.D., LL.D., F.R.S., 

 on "Anaesthetic Sleep, and the Temporary Abolition of Pain." 

 Members' Annual Subscription, ;Ci. Payment at the Door— One Penny, 

 Sixpence, and (reserved seats) One Shilling. 



VACUUM TUBES showing Focus of Blue 



Rays, highly exhausted showing Green Light only. Electrical Radio- 

 meters, 7^. 6d. to 15^. — J. WooDLEY, 31, Mcorfields, Liverpool. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



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

 libraries (Astronomical Observatory, Botanic Garden, Bussey Institution, 

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

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

 LudfateHill, London. 



jySTI^N WINSOR, Librarian. 



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 



ROYAL POLYTECHNIC— CLASSES for 



the preparation of Students for University Examinations, uader the 

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

 versity Matriculation, 1st and 2nd B.Sc, Preliminary Scientific M.B., 

 Botany, Physiolog>', Chemistry. All the work practical. 



WITHERNDEN SCHOOL, CATERHAM 



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

 Honours). Education on Natural Principles. A limited number of Pupils. 



UVIN6 SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET BIRMINGHAM. 

 RAPHIDIOPHRYS PALLIDA, 



The Freshwater Rhixopoda of F. Schulze figured in Archiv fur 

 mikroskoji. Anatomie, vol. x. Plate xxvi. fig. i. 



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

 nised as an embryo of the Polyzoa, Alcyonidiujn. 



Also t Icscules, some fine Mclicerta ringcus, and Volvox globator, &c. 

 Price List of Specimens on Application, with Stamped Addressed Envelope. 



Weekly Announcements will be made in this place of Organisms ready 

 for sale. 



WANTED, for EDUCATIONAL PUR- 



POSES. Maps, Diagrams, Geographical, Zo:-lcgical, Botanical, Che- 

 mical, Geometrical, Physiological, &c., &c. ; also. Human Skeleton. — 

 Apply, stating terms, to B., care of Mrs. House, Village, Old Charlton, 

 Kent. 



OWENS COLLEGE, MANCHESTER. 



The LENT TERM begins on TUESDAY, January 7. New Students 

 will be admitted on Mor.day, the 6th, from 10.30 to 4. Candidates muit 

 not be under fourteen years of age, and those under sixteen will be required 

 to present themselves on Tuesday, the 7th, at 10.30A.M., for examination 

 in English, Arithmetic, and the elements of Latin. 



The courses of study are adapted to the requirements of candidates for 

 the Arts and Science Degrees of the University of London. The Junior 

 Classical Classes will commence after Christmas to read the books set for 

 matriculation in June, iSyg. 



J. HOLME NICHOLSON, Registrar. 



JUNIOR NATURAL SCIENCE MAS- 



TERSHIP. — An Honour Man in the last Cambridge Natural Science 

 Tripos wishe t a obtain a Junior Natural Science Mastership after the 

 Vacation. Special Subjects- Geology, Chemistry, and Elementary 

 Physics. Fond of Teaching. — Apply to " Natural Science," care of 

 the Publisher of N.^ture, Bedford Street, Strand, W.C. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. 

 Seven hours from London. Separate Bedrooms. Systematic Teaching 

 in Science, Foreign Languages, and University Courses. 

 (^lendar post free from 



The Principal— BENJAMIN RALPH, LL.B. Dub. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Circles, y. 6d. per ounce ; Squares, 

 2f. gd. ; post free 2d. extra ; Ground-edged Slips, 5*. per gross ; als* j 

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

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



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 Teachers. 

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

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

 tricians, 4, Little Britain, E.C. 



"HALL MARK" 

 FOR THERMOMETERS. 



The Kew Committee of the Royal Society hereby give Notice that after 

 this date all Thermometers verified at the Kew Observatory will be marked, 

 free of expense, with their monogram, "ICO.," interlaced, and a register 

 number, in addition to the maker's number. 

 The Table of Errors will be furnished as usual. 

 By order, 



G. M. WHIPPLE, Superintendent. 

 Kew Observatory, December 13, 1878. 

 Scale of Charges for Ver.fication, &c., post free on application. 



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 appL- 



EOZdON 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, 5^., lar., and upwards. 

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



JAMES R. GREGORY, 



GEOLOGICAL MUSEUM, 



88, CHARLOTTE STREET, FITZROY SQUARE, 



LONDON. 



