XCVlll 



NATURE 



\Jati. 30, 1879 



MICROSCOPIC OBJECTS 



0£ •uperlative perfection, illustrating Histology and every branch of Micro- 

 sc.jpy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Medal axvarded for Excellence, Variety, ^c. 

 EDMUND WHEELER, 48W, Tollineton Road, Hollov.ay, London, N. 



UNIVERSITY OF LONDON. 



PRELIMINARY SCIENTIFIC (M.B.) EXAMINATION. 



Instructicn 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 cf the Hospital. 



For further particulars apply to the Dean, Guy's Hospital, S;uthwark, 

 S.E. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 February 2. — Matthew Macfie, Esq., en "Religicus Analogies, 

 Ancient and Modern ; with Special i?eference to the CroFS and its Con- 

 nection with Phallic Symbolism." — Members' Annual Subscription, {,\. 

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

 Shilling. 



The ELECTRIC LIGHT.— An Experienced 



Lecturer rn this subject is open to ENGAGEMENTS in any part cf 

 the ccuntry. 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 Science, care of Edward Paterson, 3, 

 Bedford Court, Covent Garden, Lcndon. 



"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 cf expense, with their mcnogram, ' K.O.," 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, 1S78. 

 Scale cf Charges for Verification, &c., pest free on applicaticn. 



NEW ATHEN/EUM CLUB 



FOR GRADUATES OF UNIVERSITIES AND MEMBERS OF 



SCIENTIFIC SOCIETIES. 



The SECOND 500 MEMBERS are n-ow being ADMITTED. 



J. LOGAN LOBLEY, Secretarj'. 

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



WITHERNDEN^CHOOL, CATERHAM 



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

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



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, Preliminary Scientific M.p., 

 Botany, Physiology, Chemistry. All the work practical. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. 

 Seven hours from Lcndon. Separate Bedroo .MS. Systematic Teaching 

 in Science, Foreign Languages, and University Courses. 

 Calendar post free fi-om 



The Pri ncipal— benjamin RALPH, LL.B. Dub. 



AN EXPERIENCED SCIENCE LEC- 



TURER has some time disengaged. His pupils have repeatedly taken 

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

 No. I, Brunswick Villas, Woolwich. 



WANTED, GOOD 3-inch ACHROMATIC 



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

 Strand. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



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

 Libraries (A?tronomical Observatory, Botanic Garden, Bussey Institution, 

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

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

 Ltidgate Hill, London. 



JUSTIN WINSOR, Librarian. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET, BIRMINGHAM. 



Specimen Tube, One Shilling, free by post ; 26 Tubes in course six 

 months for subscription of ;^i \s. paid in advance. 



T. H. has last week posted to Ins subscribers s-^me Root-Fibres covered 

 with (Ecistcs crysiallinus, Sientor Miilleri and other organ'.sms. He has 

 also betn sending out Trout Spawn, showing circulation of the blocd in the 

 embri'o, and on the yolk-bag. Hydra, Stephancceros, Phibdina, 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. 



TELESCOPE for SALE.— A Fine Instru- 



ment, 3J 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, OflSce of Nature, 

 Bedford Street, Covent Garden, London. 



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 



ELECTRICAL APPARATUS for Lecturers' 



or Private Use ; new; bargains; including Holtz Machine^ from £^ ; 

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

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

 F. B., 110, Cannon Street, London. 



ST. BARTHOLOMEW'S HOSPITAL 

 AND COLLEGE. 



Dr. KLEIN, F.R.S., will deliver a Course of Lectures on DEVELOP- 

 MENT, beginning on MONDAY, February 3rd, at 2.30. The«e lectures 

 are not confined to Students of the Hospital. 



For particulars as to fees, &c., application may be made personally or by 

 letter to the Warden of the College, St Bartholomew's Hospital, E.G. 



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. 



GEOLOGY.— In the Preface to the Student's 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, price 9s., 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 suppUed on Ae following 

 terms, in plain Mahogany Cabinets : — 



100 Specimens, in Cabinet, with 3 Trays .m m. ... £a 2 e 

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



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



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



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



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 los. Collections of 100 "good" specimens can be executed 

 without delay. 



"NOTES ON THE GEOLOGY OF SHEPPEY" post free on apph. 

 cation. 



SCIENTIFIC 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, 20^^. 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, Rocks, Shells, &c., &c. 25 Specimens 



in Cabinet, is. lod. 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 for 

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

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



JAMES R. GREGORY, 

 GE0LCK5ICAL MUSEUM, 



88, CHARLOTTE STREET, FITZROY SQUARE, 



LONDON. 



