CCVl 



NATURE 



{Oct. 23, 1879 



WANTED, Clean Copies oj NATURE, No. 472, 

 for November 14, 1878. Address — Office of 

 NATURE, 29, Bedford Street, Strand. 



MICROSCOPIC OBJECTS 



Of superlative perfection, illustrating Histolcgy, and eveiy branch of Micro 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Medal awarded for Exeellence, Variety j ^e. 

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



UNIVERSITY OF DUBLIN. 



PROFESSORSHIP OF ZOOLOGY. 



The Council "will, during the Michaelmas Term, 1879, nominate to the 

 vacant Professorship of Zoology. 



The tenure of the Professorship is for five years. 



Tile emoluments consist of a Salary of ;£2oo per annum, and £^0 paid to 

 the Professor each year for a Course cf Demonstrations in Zoolrgy. 



Candidates are requested to send their applications and testimonials to the 

 Secretary cf the Council before November 5, 1879, and copies of the same 

 to the Registrar of Trinity College. 



Further information, if required, can be obtained by reference to the 

 Registrar. 



(Signed) THOMAS STACK, Registrar. 



Trinity College, Dublin, October 21st, 1879. 



CITY and GUILDS of LONDON INSTI- 

 TUTE for the ADVANCEMENT of TECHNICAL EDUCATION. 



Technical Classes. Cowper Street School, Finsbury. — Applied Physics. 

 —Mr. W. E. AYRTON will deliver a COURSE of TWELVE LEC- 

 TURES en "Some of the Practical Applications of Electricity and 

 Magnetism,*' commencin<j MONDAY, November 3, at 7 p.m. 

 Applied Chemistry. — Dr. H. Armstrong, F.R.S., will deliver a Course of 

 Twelve Lectures on "The First Principles cf Chemistry," commencing 

 Wednesday, November 5, at 8 p.m. 



An Inaugural Lectiwe will be delivered by Mr. Ayrton, on Saturday, 

 November i, at 8 p.m., on " The Improvements Science can Effect in our 

 'I'rades and in the Condition of our Workmen.*' 



A Syllabus of each Course of Lectures can be obtained at the Halls of 

 the Companies of Mercers, Clothworkers, and Drapers, or at the Schools, 

 A, rv,\ r-- Street, Finsbury. 



J ..l: Tee for each Course is sj., for the two Courses, 7*'. 6^. 

 "fntT.d^ng Students should send in their names to the Demonstrator, 

 Cowper Street Schools, Finsbury, E.C. 

 The Inaugural Lecture will be free. 



KING'S COLLEGE, LONDON. 



PROFESSORSHIP OF PRACTICAL FINE ART. 



The Council being about to elect a Professor of Practical Fine Art are 

 now ready to receive Applications from Gentlemen desirous of offering ihem- 



J. W. CUNNINGHAM, Secretary. 



selves as Candidates. 

 For particulars apply to 



BEDFORD COLLEGE (for Ladies), 8 and 9, 



York Place, Portman Square.— LECTURES on BIOLOGY by T. 

 JEFFERY PARKER, B.Sc, on Saturdays, at 2.30. Practical Class 

 at 10 on Tuesdays. 



HENRIETTA LE BRETON, Hon. Sec. 



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, iit and 2nd B.Sc, Preliminary Scientific M.B., 

 '^otany. Physiology, Chemistry. All the work practical. 



CHARLES SMART RAY, M.D., of the 



Edinburgh University, has been elected to the " George Henry Lewes" 

 Studentship. 



■WANTED, a COPY of Prof. Allman's 



Monograph of Fresh-water Polyzoa, by Messrs. G. Bell and Sons. 

 York Street, Covent Garden, London. 



AGRICULTURE Mr. Hugh Clements will 



five a Series of Lectures on The Principles of Farming, illustrated 

 y Specimens and Experiments, from October to May, at the South 

 London Training College, Hatfield Street, Blackfriars, every Thursday, 

 at 6 P.M. 



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



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



WATER ANALYST, 



Performs every description of Water Analysts on moderate terms. 

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



the KingdooL. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS EOLTON, MICROSCOPIST'S and NATURALISrS 

 STUDIO. 17, ANN STREET, BIRMINGHAM. 



T. B. has last week posted to his subscribers specimens of Hydra vul- 

 garis,-v}\'Csi drawing and description. He has also sent out Amoeba, Actino- 

 s/>hee}ium Eiclwrnii, Lacinnlaria socialise Melicerta ringetis, Spongilla 

 Jiiiz'iatilis, Cristatella ?nucedo, Fredericella sititana. Glass Lava, &c. 



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

 is supplymg. 



Specimen Tube, One Shilling, post-free, 



Twenty-six in course 0/ Six MaitJis for Subscription c/ £x \%, 



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



Portfolio of Drawings, One Shilling. 



FUNGI, LICHENS, ALGiE, MOSSES,^ 



HEPATIC^E, FliRNS, &c., prepared "as Microscopical Slides, may be- 

 obtainedat lu. pertwo dozen objects. — ^pply Rev. J. E. Vize, Forden 

 Vicarage, Welshpool. 



THE LONDON LIBRARY, 



12, ST. JAMES'S SQUARE, S.W. 



President. 

 Thomas Carlyle, Esq.. 



Vice-Presiden ts. 



The Dean of Westminster, Right Hon. W. E. Gladstone, M.P., 



E. H, Bunbury, Esq., J. Spedding, Esq. 



Trustees. 



Lord Houghton, Earl of Carnarvon, Earl of Rosebery. 



Committee. 



Sir James Alderson, F. W. Burton, Esq., Rev. Canon Cheetham, T. C. 



Conybeare, Esq., VV. Courthope, Esq., Sir Frederick ElHot. Rev, E. E. 



Estcourt, H. W, Freeland, Esq., Sydney Gedge, Esq., Prof. Gladstone, 



F. Harrison. Esq., Dr. J. J. Jusserand, C. M. Kennedy, Esq., Rev. Dr. 



Stanley Leathes, W. Watkiss Lloyd, Esq.. H. Maxwell Lyte, Esq., Eart 



of Morley, James Cotter Morison, Esq., Dr. Munk, Rev. Mark Pattison, 



F. Pollock, Esq., Rev. Dr. Reynolds, Herbert Spencer, Esq., Ledie 



Stephen, Esq. 



The Library contains 90,000 Volumes of Ancient and Modem Literature, 

 in various languages. Subscription, f-^ a year, or;£2 with Entrance Fee of 

 fd ; Life Membership, ^26. Fifteen Volumes are allowed to Country and 

 Ten to Town Members. Reading Rooms open from Ten to Half-past Six. 

 Catalogue, nciv edition, 1875 (1,062 pp.), price i6i. ; to Members, x%5. 

 Prospectuses on application. 



ROBERT HARRISON, Secretary and Librarian. 



ELECTRICAL APPARATUS for Public 



Lectures, Science Classes, Research, and Private Use. — FRICTIONAL 

 MACHINES and all experimental accessories, new patterns, improved 

 insulation, highest efficiency. HOLTZ MACHINES, reliable in all 

 weathers, from ;^5. Powerful LEYDEN BATTERIES, half cost of 

 usual jars. VOLTAIC BATTERIES and apparatus. New PORT- 

 ABLE BICHROMATE BATTERIES, pneumatic stirring gear, in 

 improved cases, self-packing. ELECTRIC LAMPS for lantern use, 

 £^ to ^8 Si., action equalling the most costly. Cheaper Lamps. BEST 

 COILS, 1-inch Spark, 75J. New pattern Bells. Jars, Carbons, Clarrps, 

 Wires &c. MEDICAL CONSTANT BATTERIES.— New Descrip- 

 tive List, 24 pp. " Useful," vide Nature. Gratis.— F. H. BROOK, 

 107, Lornmore Road, Walworth, Lcndon, S.E. 



ASTRONOMICAL TELESCOPES.— 



CALVFR'S REFLECTING TELESCOPES of the highest exceUence, 

 from sj-mch to 36-inch aperture. sj-inch, with equatorial motion, 

 ;^i5 \s^-\ 6-inch Equatorial, complete; Photo, with Calver's " Hints 

 on Silvered Glass Reflecting Telescopes," 9 stamps.— G. CALVJi)R» 

 F.R.A.S., Hill House, Widford, Chelmsford- 



FuR SALE. — A very fine isJ-inch Equatorial, with Clock. 



MICROSCOPE and BALANCES as MADE 



by VV. STONE, 44, Gloucester Street, Holbom (late Alabaster and 

 Co ), are the best and cheapest. Try his 35*. Box Balance, warranted 

 to lum one-twentieth of a grain; or 40*. Microscope. Price List o£ 

 Balances (Illustrated) post free. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Cyrcles, 3*. ^d. per ounce ; SquareSi 

 2f. ^. ; post free id. extra ; Ground edged Slips, %s. per gross ; also 

 ot!ier Mounting Materials and Objects prepared for mounting.— CHAS* 

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



MINERALOGY AND GEOLOGY. 



A New List of Collections of Fossils, Minerals, and Rocks now read^t 

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

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

 ratus ai d Materials of all kinds in Cases or separately. New Patterns d! 

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



JAMES R. GREGORY, 



MUSEUM OF GEOLOGV, 



88, CHARLOTTE STREET, FITZROY SQUARE. 



