NATURE 



[May 8, 1879 



WANTED, Clean Copies of NATURE, No. 472, 

 for November 14, 1878. Address — Office of 

 NATURE, 29, Bedford Street, Strand. 



~ "^inCROSCOPIC OBJECTS 



Of superlative perfection, tllustrating Histology and eveiy branch of Micrcv 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prite M<dal awarded for Excellence, Variety, (s'c. 

 KDMUND WHEELER, 48N, Tollinuton Road. Holloway, London, N. 



TUITION for the UNIVERSITIES, CIVIL 



Service, and Army. — Pupils prepared f<;r the above by a Tutor in South 

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

 South Kensington. 



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, 

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

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

 Ludgnte Hill, London. 

 JUSTIN WTNSOR. Librarian. 



MIDLAND UNION OF NATURAL 

 HISTORY SOCIETIES. 



SECOND ANNUAL MEETING at LEICESTER, May ao and 21, 



1879, under the direction of the Leicester Literary and Philosophical 

 Society. 



CONVERSAZIONE znA EXHIBITION of OBJECTS of SCIENCE 

 and ART, at the Town Museum, on Tuesday Evening, May 20. Tickets, 



GEOLOGICAL and BOTANICAL EXCURSIONS to CHARNWOOD 

 FOREST, on Wednesday, May 21st. Tickets, 7^. td. 



Tickets and Programmes are now ready, and may be obtained from the 

 Hon. Sec. to the Union, 



Mr. W. J. HARRISON, Town Museum, Leicester. 



BUNSEN BATTERY, 40 Cells, 7-inch Car- 



bons, ;^8, or 4*. Sd. i>er Cell. Grove, Trays, ic-pint Cells, £^. Bichro- 

 mate. 12 half-gallon in Case, l^. ELECTRIC LAMPS, best make, 

 3 and 5 Guineas, Coils, London made, i-inch spark, 70^-. Rotary 

 Engines. &c. Powerful HOLTZ ELECTRICAL MACHINES, 

 special bargains, £^ to ^£20; guaranteed satisfactory and reliable. 

 Apparatus for Frictional 1 lectricity at very lowest prices. Lists post 

 free. — F. H. Brook, 107, Lorrimore Road, London, S.E. 



The LANCASTER POCKET CAMERA 



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

 Stand, best Lens with plate of Diaphragms, &c., &c., £s- Particulars 

 free 



The LANCASTER CARTE PHOTOGRA- 

 PHIC APPARATUS, with Chemicals, &c., &c., complete, £i 51. 

 FIRST QUALITY ASTRONOMICAL TELESCOPES with Object 

 Lenses, by Wray, 2i-inch, £e, os. ; zj-inch, £-j lor. ; 25-inch, aid; 

 3-inch, £11 lof. ; 3j-inch, £15 15J. ; 4-inch, j£25 ; 4]-xnch, ^£40; 

 5-inch, £ss, &c. Capital Student's Microscope, ;C3 3^- Collegian's 

 First Quality Microscope, £<:, 55. Illustrated Catalogue, 3 Stamps. 

 J. LANCASTER & SON, Opticians, Birmingham. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. 

 Seven hours from London. Skparatk Bkdroous. Systematic Teaching 

 in SciBNCB, Foreign Languages, and University 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 

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

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

 Botany, Physiology, Chemistry. All the work practical. 



"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, *' KO.,'* 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 Verification, Sec, pest free on application. 



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. Ogilvie, F.L.S. 

 SizevIIte House, Leiston, Suffolk. 



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 a specimen of Elver, or 

 Fry of Eel. with Illustration and Description. He has also distributed 

 Vatvox globator, Pandorina, Closterium monili/emm and rcttratutn, 

 Nitella, Chara, Amoebae, Cristatella, Plumatella, Fredericclla, PaludiceiU. 

 Stephanoceros, Mchcerta, Hydatina, &C. He has also ready, Fish Spawn 

 (probably Perch) and growing Zoospores of Algae, with Illustrations. 



Weekly announcements will be made in thLS place of organkms T. B. 

 is supplying. 



Price List of Specimeni on application, with Stamped Addre^ed 

 Envelope. 



Specimen Tube, One Shilling, post-free. 



Twenty-six Tubes in course 0/ Six Months for Subscripii0n ^ £1 is. 



Price List of Specimens on applica tion, with stam ped addressed envelope. 

 LABORATORY, 38, GRACECHURCH STREET, LONDON, E.G. 



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. 



SHELLS.— A Gentleman who has lately 



arrived in this Country has a quantity of Shells to dispose of, consisting 

 of about 3.500 Specimens. — For particulars apply to Richardson & 

 Co., 13, Pall Mall, S.W. 



DODO'S BONES,— I have some. Pelvis and 



Leg, verified by Owen, and will sell. Museum or Collector. Pkise 

 maJce offer. — Charles Fox, Surgeon, St- ke Ncwington, N. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Sheernkss-on-Ska, respectfully intimatei thai 

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

 cannot receive any more orders for " extra selected " specimens at presecc 



Orders for 10s. Cellecttons of xoo *' good " specimens can be exscuted 

 without delay. 



*\ NOTES ON THE GEOLOGY OF SHEPPEY" post free on appU- 

 cation. 



ELECTRICAL, SCIENTIFIC, & PHOTO- 



GRAPHIC APPARATUS.-Electric Bells, Fire ind Thief Alarmj, 

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

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

 rials. Repairs and Alteratins. New Illustrated Descriptive Caulogue, 

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

 Phito. Li.st free.— DALE & CRAMPTON, Manufacturing Opticians, 

 4, Little Bnta n, London, E.G. 



MINERALOGY AND GEOLOGY. 



A New List of Collections of Fossils, Minerals, and Rocks »ow ready, 

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

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

 ratus ar d 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 SQUAl tE. 



MINERALOGY AND GEOLOGY. 



FINE AND INTERESTING GENICULATED CRYSTALS OF 



CASSITERITE, BRITTANY. 

 CUPRITES, NATIVE COPPERS, AND CHALCOTRICHITES, 



SERVIA 

 MOLVBDATES OF LEAD, XH-AH. 

 SILVER ORES FROM THE "EMMA" MINE. 

 CALCITES, CUMbERLAND. CERUSITES, UTAH. 

 TABLE OF HARDNlibS, m. M. 



FSIVAT£ LESSONS AND EVENING CLASSES. 



SAMUEL HENSON, 

 277 {Lateiiia], STRAND, LONDON. W.C . 



GEOLOGY. — In the Preface to the Student's 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, price 91., h« says : 

 — " As it is impossible to enable tne reader to recognise rocks 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(i49, Strand), Teacher of Mineralogy at King's 

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

 terms, in plain Maho^my Cabinets : — 



100 Specimens, in Cabmet, with 3 Trays ___;£•< o 

 300 Specimens, in Cabinet, with 5 Trays _ ._ _ 5 5 o 

 300 Specimens, in Cabinet, with f Drawers « _ 10 lo o 

 400 Specimens, in Cabinet, with r3 Drawers ~ » ai o o 

 M ore extensive Collec tions at 50 to 5,000 Guineas each. 



DIAMONDS AND OTHER PRECIOUS 



STONES. Scientific opinion givenas to GENUINENESS, PURITY, 

 and VALUE.- Bsvca VVRniir. 90, Great Russell Street, London, 



