C IV 



NATURE 



{March 20, 1879 



MICROSCOPIC OBJECTS 



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

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prite Medal awarded for Excellence, Variety, tSr-v. 

 EDMUND WHEELER, 48N, TolUngton Road. Holloway, London, N. 



KOYAL AGRICULTURAL SOCIETY OF 

 ENGLAND. 



AGRICULTURAL EDUCATION. 



The Examination of Candidates fcr the Society's Priie and Cerlificater, 

 including the Life Membership of the Society, will commence en MONDAY, 

 April 7th, at 2 p. M. 



Copies of the Form of Entry, which is required to le ftnt in by April ist 

 1870, may be had on applicaticn to 



H. M. JENKINS, Secretary. 



12, Hanover Square, London, W. 



QUEEN'S UNIVERSITY IN IRELAND. 



NOTICE is Hereby Given that on FRIDAY, the 1 8th April next, the 

 Senate will proceed to elect an EXAMINER in MEDICINE at a salary of 

 .j£ioo, to hold such Examinations during the ensuing year as are now, or shall 

 be, appointed by the Senate. 



Applications are to be made by letter addressed to the Secretary, Queen's 

 University, Dublin Castle, en or before TUESDAY, the Eth APRIL. 

 - None received after that date will be considered. 



It is particularly desired by the Senate that no personal applicaticn of any 

 kind be made to its individual members. 



By order of the Senate, 



G. JOHNSTONE STONEY, M.A., F.R.S., 



Secretary to the Uni\-ersity. 



Queen's University, Dublin Castle, 14th March, 1879. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 March 23.— Walter Herries Pollock, Efq.. M.A. (Cantab), on 

 " Richelieu : the Political Times of Louis the 14th of France." — Members' 

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

 and (reserved seats) One Shilling. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. 

 SeTcn hours from London. Separate Bedrooms. Systematic Teaching 

 in Science, Foreign Languages, and University Courses. 

 Calendar post free from 



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



ROYAL POLYTECHNIC.— CLASSES for 



tMe preparation of Students for University Examinations, under the 

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

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

 Botany, Physiology, Chemistry. All the work practical. 



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. 



WITHERNDEN SCHOOL, CATERHAM 



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

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



TUITION for the UNIVERSITIES, CIVIL 



Service, and Army. — Pupils prepared for the above by a Tutor in South 

 Kensington. Address — Tutor, Lamley's Library, Thurlce Place, 

 South Kensington. 



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 rocks and mine- 

 rals at sight by aid of rerbal 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 Uie following 

 terms, in plain Mahogany Cabinets : — , 



100 Specimens, in Cabinet, with 3 Trays ... .m ~< ;f a a o 



200 Specimens, in Cabinet, with 5 Trays ...... m. 5 5 o 



300 Specimens, in Cabinet, with 9 Drawers ... ... 10 10 e 



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

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



COLLECTION of CRAG FOSSILS, Red 



and Coralline, about 65 Species, 400 Specimens, cleaned, hardened, 

 named.— For particulars address Mr. J. W. Elwes, Otterbcume, 

 ■Winchester. 



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 Plumatella refens just 

 emerging from the Statoblast, with sketch from life. He has also distributed 

 Embryo Trout and Salmon, Young Tadpoles, Sponge, Fredericella, Flosci; 

 laria, Melicerta, CEcistes, &c. 



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

 is supplying. 



Price List cf Specimens on application, with Stamped Addressc 

 Envelope. 



A friend has e flfered T B. a constant supply of mounted and unmcuntt' 

 specimens of all kinds of Parasites of Man and Animals (Entozca aii' 

 Ectozoa), also sections of all Mammalian organs. 



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, 

 LudgateHill, London. 



JUSTIN WINSOR, Librarian. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Cu-cles, ■>,$. (id. per ounce ; Squares, 

 2J. gd. ; post free 2d. extra ; Ground edged Slips, $s. per gross ; also 

 other Mounting Materials and Objects prepared for mounting.— CH AS. 

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



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. 

 T2, FRITH STREET, SOHO, W, 



MINERALOGY AND GEOLOGY. 



24 assorted Minerals for Blowpipe Experiments, with printed List, in 



Pocket Case, 2s. ; 24 ditto (second series), 2j. ; Mch's Scale of Hardness 



of Minerals, 9 Specimens with File and streak tablet in a convenient Case,. 



41.; von Kohbell's Scale of Fusibility ef Minerals, 6 Specimens in Pccket 



Case, 2s. ; Geokgical Collecting Bag complete, 4^^. ; Ditto Hammer 



Holder and Strap, 2S. Geological Charts, Books, Hammers, Chisels, 



Lenses, Acid Bottles, Glass-capped Boxes, Cement for Meunting and Re 



pairing Fossils, Tablets, Card Trays, &c., &c. Minerals, Fessils, ar 



Rocks, sent en approval and for selection to all parts of the world. 



THOMAS J. DOWNING, 



38, WHISKIN STREET, LONDON, E.C. 



catalogues free. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Shberness-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. 



MINERALOGY AND GEOLOGY. 



A New List of Collections of Fessils, Minerals, and Rocks now ready, 

 including Special Collections to illustrate the various Text-books, in 

 Cabinets. List of Sections cf Rocks for the Microscope. Blowpipe Appa- 

 ratus and Materials of all kinds in Cases or separately. New Patterns of 

 Geological Hammers, with prices. List of New and Second-hand Books of 



JAMES R. GREGORY, 



MUSEUM OF GEOLOGY, 



88, CHARLOTTE STREET, FITZROY SQUARE. 



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 L-\NTERN SLIDES. 



J. LANCASTER & SON, Bull Street, Birmingham. 



The LANCASTER ELECTRIC LAMP, de- 

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

 No. I, to bum 3 hours, £2 as.; No. 2, to bum 6 hours, £z y- largest 

 size, £s ss. Set of 20 Quart Bunsen's Cells, £^ 4J. Model Electri 

 Lamp and 10 Cells, £2 12s. 6d. 



ELECTRICAL & SCIENTIFIC APPARA- 

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

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

 Coils and Frictional Machines are specialties. Electrical Bells, tire 

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

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

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

 tns made to sketch.-DALE & CRAJJPTON. Manufactunng Elee. 

 tricians, 4, Little Britain, E.C. 



