XXVI 



NATURE 



\_May 2 2, 1879 



WANTED, Clean Copies of NATURE, No. 472, 

 for November 14, 1878. Address — Office of 

 NATURE, 29, Bedford Street, Strand. 



MICROSCOPIC OBJECTS 



Of superlative perfection, illiutrating Histology and eveiy 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, Tollinirton Road. Holloway. London, N. 



ROYAL GEOGRAPHICAL SOCIETY. 



The ANNIVERSARY MEETING will be held (by permission of the 

 Chancellor and Senate) in the Hall of the University of London, Burling- 

 ton Gardens, on MONDAY, May 26th, at 2 p.m. 



Sir RUTHERFORD ALCOCK. K.C.B., &c., Vice-President, in the 

 Chair. 



The DINNER will take place at Willis's Rooms, at half -past 6, on the 

 same day. Sir Rutherford Alcock, K.C.B., in the Chair. 



Dinner Charge, 215., payable at the door; or Tickets to be had and places 

 taken at i, Savile Row, Burlington Gardens, W. 



The Friends of Fellows are admissible to the Dinner. 



OWENS COLLEGE, MANCHESTER. 



The Council invites Applications for the Lectureship in the German Lan- 

 guage and Literature, which will become vacant on the zgth September 

 next. 



Information respecting the Duties and Emoluments may be obtained on 

 Application to Dr. Greenwood, the Principal of the College. Applications 

 and Testimonials, under cover to the Registrar, will be received up to the 

 12th June. 



J. HOLME NICHOLSON, Registrar. 



OWENS COLLEGE, MANCHESTER. 



THE DAUNTESEY SCHOLARSHIPS. 



An entrance Scholarship of the value of (about) One Hundred Pounds will 

 be offered for competition in October next Candidates must not be more 

 than 25 years of age on the ist October, and must not have been students in 

 the Medical Department of the College. The person elected will be 

 required to devote himself to Jrtcdical Studies at the College during three 

 years. A copy of the Regulations will be forwarded on application. 



J. HOLME NICHOLSON, Registrar. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALU 

 Seven hours from London. Separate Bedrooms. Systematic Teaching 

 in Science, Foreign Languages, and Universitv Courses. 

 Calendar post free from 



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



ROYAL POLYTECHNIC— CLASSES for 



the preparation of Students for University Examinations, under the 

 d.rectionof EDWARD B. AVELING, D.Sc, F.L.S. London Uni- 

 -vcrsity Matriculation, ist and and B.Sc, Prehminary Scientific M.B., 

 - otany, Physiology, Chemistry. All the work practical. 



TUITION for the UNIVERSITIES, CIVIL 



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

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

 South Kensington. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



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

 Libraries (Astronomical Observatory, Botanic Garden, Bussey Institution, 

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

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

 Ludgate Hill, London. 

 JUSTIN WINSOR, Librarian. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Co-cles, y. id. per ounce ; Squares, 

 2j. gd. : post free 2^. extra ; Ground edged Slips, $s. per gross ; »lio 

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

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



"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, " K.O.," interlaced, and a register 

 number, in addition to the maker's number. 

 Ihe Table of Errors will be furnished as usual. 

 By order, 



G. M. WHIPPLE, Superintendent. 

 Kew Observatory, December 13, 1878. 

 Scale of QuLTges for Verification, &c., post free on application. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO. i7» ANN STREET, BIRMINGHAM. 



T. B. has last week posted to his subscribers Pandorina m&rutn, with 

 Sketch, Melicerta jiugens, or Melicerta tubicolaria. He has also distributed 

 Volvox giobator, Nitella, Chara, Amoebae, Cristatella, Plumatella, Fred- 

 ericclla, Stephanoceros, Melicerta, Hydatina, Philodina, &c. 



Weekly announcements will be made in thLs place of organisms T. B. 

 is supplying. 



Specimen Tube, One Shilling, post-free, 



Twenty-six Tubes in course 0/ Six Months for Subscription of £1 is. 

 Price List of Specimens on application, with stamped addressed envelope . 



A GENTLEMAN who is going on a Dredg- 

 ing Cruise round the British Isles would be glad to meet another Natu- 

 ralist who would be willing to accompany him during the whole or part 

 of the voyage. — For further particulars apply to C. P. Ogilvje, F.L.S. 

 Sizeville House, Leiston, Suffolk. 



The LANCASTER POCKET CAMERA 



for plates 4J X 3J inch, having three double dry-plate Slides. Umbrella 

 Stand, best Lens with plate of Diaphragms, &c., &c., £$■ Particulars 

 free 



The LANCASTER CARTE PHOTOGRA- 

 PHIC APPARATUS, with Chemicals. &c., &c., complete, /s 5J. 

 FIRST QUALITY ASTRONOMICAL TELESCOPES with Object 

 Lenses, by Wray, 2l-inch, £k os. ; 2l-inch, £■; jos. ; aj-inch, ^lo ; 

 3-inch, £12 JOS. ; sJ-inch, £^5 15^-; 4-inch, £25; 4]-inch, ;^4o; 

 5-inch, ;£55. &c. Capital Student's Microscope, £3 y- Collegian's 

 First Quality Microscope, £^ ss. Illustrated Catalogue, 3 Stamps. 



J. LANCASTER & SON, Opticians. Birmingham . 



GEOLOGY.— In the Preface to the Student's 



ELEMENTS of GEOLOGY, bv Sir Charles Lyell, priee 95., he says : 

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

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

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

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

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

 terms, in plain Mahorany Cabinets :— 



100 Specimens, in Cabmet, with 3 Trays •*• m* » £* t 

 200 Specimens, in Cabinet, with 5 Trays » m. •« 5 5 o 

 300 Specimens, in Cabinet, with g Drawers ». ». 10 10 

 400 Specimens, in Cabinet, with 13 Drawers ». •« ai c 

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



LABORATORY, 38, GRACECHURCH STREET, LONDON, EC. 



A. ANTHONY NESBIT, F.C.S., 



WATER ANALYST, 



Performs every description of Water Analysis on moderate terms. 



Properly cleansed bottles for the reception of samples sent to any part of 



the Kingdom. 



ELECTRICAL, SCIENTIFIC, & PHOTO- 



GRAPHIC APPARATUS.- Electric BeUs, Fire and Thief Alarms, 

 and Automatic Switches. Induction Coils, Frictional Machines, lamps, 

 and Batteries. Microphones, Wires, Magnets, Carbons, and all Mate- 

 rials. Repairs and Alterations. New Illustrated Descriptive Catalogue, 

 one Stamp. Cameras, Dry Plates, Sensitive Paper, and all Chemicals. 

 Photo. List free.— DALE & CRAMPTON, Manufacturing Optcians. 

 4, Little Britain, London, E.C. 



MINERALOGY AND GEOLOGY. 



FINE AND INTERESTING GENICULATED CRYSTALS OF 



CASSITERITE, BRUriANY. 

 CUPRITES, NATIVE COPPERS, AND CHALCOTRICHITES, 



SERVIA 

 MOLVEDATES OF LEAD, UTAH. 

 SILVER ORES FROM THE "EMMA" MINE. 

 CALCITES, CUMBERLAND. CERUSITES, UTAH. 

 TABLE OF HARDNESS, ss. id. 

 PRIVATE LESSONS AND EVENING CLASSES. 



SAMUEL HENSON, 

 277 (Late iiS"), STRAND, LONDON, W.C . 



MINERALOGY AND GEOLOGY. 



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

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

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

 ratus ard 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. 

 SHEPPEY FOSSILS. 



W, H. SHRUBSOLE, Sheerness-on-Sha, 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 lof. Callections of 100 "good" specimens can be executed 

 without delay. , ,. 



••NOTES ON THE GEOLOGY OF SHEPPEY" post free on applv 

 cation. 



I 



