X2 



NATURE 



SJan. 23, 1879 



MICROSCOPIC OBJECTS 



Of (uperlative 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, ^S^'f . 

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

 Botany. — Rev. G. Henslow, M.A. (Christ's Col., Camb.), Lecturer on 



Botany to the Hospital. 

 Physics.— D. McAlister, B.A.,B.Sc., (Lond.) (Fellow of St. John's Col., 



Camb.), Demonstrator of Natural Philosophy to the Hospital. 

 Zoology. — Norman Moore, M.D. (St Cath. Col., Camb.), Lecturer on 



Comparative Anatomy to the Hospital. 

 Chemistry. — H. E. Armstrong, Ph.D., F.R.S., Demonstrator of Chemistry 



to the Hospital. 

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

 entire Course (including practical instruction aiid materials) — To Students 

 of the Hospital, ;C8 Zs.\ to others, ;{Jio lor. 



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

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



MATRICULATION.— LONDON 

 UNIVERSITY. 



Six months' Course. Fee, ;^io lar. 



1ST BACHELOR OF SCIENCE and PRELIMINARY SCIENTIFIC 

 M.B. Six months' Course. V^e, £10 los. 



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 OF LONDON. 



PRELIMINARY SCIENTIFIC (M.B.) EXAMINATION. 



Instruction is given in all the subjects'of the above Examination at GUY'S 

 HOSPITAL during both Winter and Summer Sessions. The Class is not 

 confined to Students of the Hospital. 



For further particulars apply to the Dean, Guy's Hospital, Southwark, 

 S.E. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 January 26. — Rev. J. F. Blake, M.A , F.G.S., on "The Microscope 

 in Geology." With O.xyhydrogen Lantern Illustrations. — Members' 

 Annual Subscription, £1. Payment at the Door — One Penny, Sixpence, 

 and (reserved seats) One Shilling. 



AN EXPERIENCED SCIENCE LEC- 



TURER has some time disengaged. His pupils have repeatedly taken 

 the first place at the Military and other Exammations. — Address F.G.S., 

 No. I, Brunswick Villas, Woolwich. 



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. TrUbner & Co., 57 and 59, 

 LudgateHill, London. 



JUSTIN 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, Berners 

 Street. W _^__^ 



SCIENCE AND ART DEPARTMENT 



OF THE COMMITTEE OF COUNCIL 



ON EDUCATION. 



EXAMINATIONS IN DRAWING IN ELEMENTARY DAY 

 SCHOOLS. 



The SCIENCE and ART DEPARTMENT will hold EXAMINA- 

 TIONS in ELEMENTARY DRAWING, through the Agency of the 

 Managers in Elementary Day Schools throughout the Kingdom. 



These Examinations will take place on MONDAY, the loth of March, in 

 Elementary Schools at which Instruction in Drawing is given by Persons 

 certificated in Second Grade Drawing. Payments to the Managers and 

 Prizes to the Children and Pupil Teachers are oflTered on the results of 

 these Examinations. 



Applications for Examination must be made (on Form No. 520) before 

 the ist of February, to the " Secretary, Science and Art Department, 

 London, S.W." 



By Order of, 



THE COMMITTEE OF OUXCIL ON EDUCATION. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET BIRMINGHAM. 

 RAPHIDIOPHRYS PALLIDA, 



The Freshwater Rhixopoda of F. Schulie figured in Archiv fiir 

 mikroskop. 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, Akyonidinin. 



Also Floscules, some fine Mclicerta ringens, and Volvox globator, &c. 

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



Weekly Announcements will be made in this place of Organisms ready 

 for sale. 



DIAMONDS IN MATRIX. 



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

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

 12, FRITH STREET, SOHO, W. 



^A^ANTED, GOOD 3-inch ACHROMATIC 



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

 Strand. 



ELECTRICAL & SCIENTIFIC APPARA- 

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

 from \s. f>d. 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 Terc'iers. 

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

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

 tricians, 4, Little Britain, E.G. 



THIN GLASS FOR MICROSCOPIC 



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

 2S. gd. ; post free 2d. extra ; Ground-edged Slips, 5X. per gross : also 

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

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



ELECTRICAL APPARATUS for Lecturers' 



or Private Use ; new; bargains; including Holtz Machines from jC^ ; 

 powerful Leyden Batteries. Also Grove and Bunsen Batteries, Auto- 

 matic Regulator for Electric Light, &c.— For list, apply, letter only, 

 F. B., no. Cannon Street, London. 



SCIENTIFIC CHRISTMAS 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, 2ar. 200 Selected, 40J. 

 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. 25 Specimens 



in Cabinet, 2J. lorf. carriage paid. 



THOMAS J. DOWNING (MINERALOGIST), 



38, WHISKIN STREET, LONDON, E.G. 



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 f ^r 

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

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



JAMES R. GREGORY, 

 GEOLOGICAL MUSEUM, 



88, CHARLOTTE STREET, FITZROY SQUARE. 



LONDON. 



GEOLOGY In the Preface to the Student*s 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, price 9*., he says: 

 —"As it is impossible to enable the reader to recognise roeks 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't 

 College, London." These Collections are suppUed on the follownf 

 terms, in plain Mahogany Cabinets : — 



100 Specimens, in Cabinet, with 3 Trays ... >.. ... f,^ a o 



200 Specimens, in Cabinet, with 5 Trays ~ S 5 ° 



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



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



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



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Sheerness-on-Sba, respectfully intimates thai 

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

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



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

 without delay. , 



" NOTES ON THE GEOLOGY OF SHEPPEY " po-t free on apph- 



