CXCVIU 



NA TURE 



[Od. 1 6, 1879 



MICROSCOPIC OBJECTS 



■ Of superlative perfection, illustrating Histolcgy, and every branclt of Micro 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Medal azmrded for Excellence, Varicly, &'c. 

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



GEORGE HENRY LEWES 

 STUDENTSHIP. 



This Studentship has been f< unded. in memory of Mr. George Henry 

 Lewes, for the purpose of enabhng the holder for the time being, to devote 

 himself wholly to the prosecution of original research in physiology. The 

 Studentship, the value cf which is slightly under 200/. per annum paid 

 quarterly in advance, is tenable for three years, during which time the 

 student is required to carry on. under the guidance of a Director, physio- 

 logical investigations to the complete exclusion of all other professional 

 occupaticns. No person will be elected as a "George Henry Lewes 

 Student" who dees not sati,^fy the Trustees and Director first as to the 

 promise of success in physiological inquiry, and seccnd as to the need of 

 pecuniary assistance. Otherwise all persons of both sexes are eligible. 

 Applications, together with such informatjun concerning ability and circum- 

 stances, as the Candidate may think proper, should be sent to the present 

 Director, Dr. Michael Foster. New Museums, Cambridge, not later than 

 Oaober 15, 1879. The appointment will be made and duly advertised as 

 soon as possible after that date. 



TiHfi '*HANSA," 7" 



Published since 1864, id Hamburg, is the only independent professional 

 paper in Germany, dedicated e.xclusively to Maritime Objects. Essays, 

 Critiques, Reviews, Reports, Advertise menu. Strict eye kept upon the deve- 

 lopment of Mannine Aiiairs ui every respect. Every second Sunday one 

 Number in 4to at least : frequent supplements and drawings. SubscriptioD 

 at any time; preceding numbers of the year furnished subsequently. Pri« 

 12*. for twelve months. Advertisements ^d. a line, widely spread by this 

 paper; considerable abatemcni for 3, 6, 12 months* insertion. Business 

 Ollice: Aug. Meyer and Oieckmann, Hamburg, Alterwall, 28. Edited by 

 W. V. Frkbdkn. M.R., Maiiihurji, Alexander Street, 8. 



INSTITUTE of CHEMISTRY.— The Presi- 



dent has offered two Prizes of ^50 each for the two best original Inves- 

 tigations involving Gas Analyses. These Prizes will be open to Asso- 

 ciates, and to all persons (except Fellows cf the Institute) who shall, 

 before the 31st December next, have qualified for the Associateship in 

 all respects short of pa^s.ng the prescribed Practical Examination ; and 

 successful competitii-n for these Prizes will be accepted in heu of such 

 practical examination.— Further information maybe obtained on appli- 

 cation to the Secretary, Mr. C E. Groves. Somerset House Terrace. 

 W.C. _^ 



GOVERNMENT GRANT OF £i,ooo. 



A Meeting of the Governm<rnt-Grant Cf>mmittee will be held in February, 

 iBSo. It IS requested that applications to be considered at that Meeting be 

 forwarded to the Secretaries o the Royal Society, Burlington House, before 

 the 31st of Decembtr, 1879. 



GOVERNMh-NT FUND OF £4,000. 



FOR THE PROMOTI>>N OF SCIENTIFIC RESEARCH. 



A Meeting of the Government-Fund Committee will be held in Febniary, 



1880. It is requested that applications to be considered at that Meeting be 



forwarded t ) the Secretaries if the Royal Society, Burlington House, before 



the 31st oi December, 1879. 



ROYAL POLYTECHNIC— CLASSES for 



the preparation ot atudtnt-s tor University Examinations, under the 

 direction of KDWAkO b. AVELING, D.Sc, F.L,S. London Uni- 

 Tersity Matriculation, i%x and 2nd B.Sc, Preliminary Scientific M.B., 

 Rotany, Physiology, Ch»*mistry All the work prac tical. 



The REV, GEORGE HENSLOW, F.L.S., 



&c., has ONE VACANtjy fur a Medical or other STUDENT, for 

 BonrdKaA Residence. Use of Microscopes and Scientific Library, &c., 

 if required. '1 erms, Two Guineas per week, inclusive.— 6, Titchfield 

 Terrace. Regent's Park, N.W. 



TELESCOPE for SALE. 



MR. RICHARD A. PROCTOR, being about to leave England for 

 fifteen months, desires to part with 



AN 8i INCH BROWNING-WITH REFLECTOR 

 (the Speculum a singularly fine specimen of Mr. With's handiwork), 

 equatonally mcuntea, wiih cl.ckwork, complete set of eye-pieces, two 

 solar eye-pieces (single and double prisms), neutral tint wedges, &c., for 

 One Hundred Guineas U" thirds ol the original price). 



Apply to Mr. BRO«- NING. F.R.A S,, 63, Strand, where the mstru- 

 ment, cleaned and in go -d condition, can be seen and examined. 



KING'S COLLEGE, LONDON. 



PROFESSORSHIP OF METALLURGY. 

 The Council being about to elect a Professor of Metallurgy are now ready 

 to receive applicali.,ns from gentlemen desirous of offering themselves as 

 Candidates. For particulars apply to 



' J. W. CUNNINGHAM, Secretary. 



LIVING SPECIfyiENS FOR THE IVIiCROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET, BIRMINGHAM. 



T. B. has last week posted to his subscribers specimens of Diaftomut ' 

 castor >>i\\\t drawing and description. He has also sent out Amoeba;, Actitio. 

 splixtium Eicharnii, Rafhtdiophrys pallida, Zoothamniiim arlm.mila, 

 Lacinniaria sociatis, Limnias cfratopliylli, Cristatella tnucedo, &c. 



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

 is supplying. 



Specimen Tube, One Shilling, post-free, 



Twenty-six Tules in course 0/ Six Months for Subscription 0/ ^-i iJ. 



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



PoRTroLio OF Drawings, One Shilling. 



METALLURGY. 

 ROYAL SCHOOL OF MINES, 



JERMYN STREET. 



Dr PERCY, F.RS , will commence a Course of not fewer than Fifty 

 Lectures on METALLURGY, on WEDNESDAY next, the 22nd insLint, 

 at Two o'clock p.m., to be continued on each succeeding Thursday, Mon- 

 day. Tuesday, and Wednesday, at the same hour. Fee for the Course, i,^. 



'' '• ' F. W. RUDLER, /ffiu/mr. 



THE LONDON CLAY CLIFFS OF 



SHEPPEY have lately been wasting very rapidly, and a large quantity 

 of interesting Fossils have been washed out. A Representative Series of 

 100 Specimens, correctly named, will be sent, carnage paid, to London, 

 on receipt of 10^. ; or one small Specimen each of 12 Species, ptst-free 

 for li. 2^., by 



W. H. SHRUBSOLE, F.G.S., Sheerness-on-Sea. 



ADVERTISING. 

 C. H. MAY 8c CO., 



GENERAL ADVERTISING OFFICES, 

 78, GRACECHURCH STREET, LONDON, E.G. 

 (The only Address.) 

 ESTABLISHED 1846. 

 Advertisements of every description received for insertion in all News- 

 papers, Magazines, Reviews, &c., at the same rates as at the olEces of the 

 papers. , . ,. 



Estimates for General Advertising. Reduction for a senes. 

 Liberal terms to large advertisers. 



Adverusements are also received for all newspapei^, which may be ad- 

 dressed to these OlEces, without extra charge, and replies forwarded, if 

 required. . , . t t 1 j- 



C H. MAY & CO., having special communication with the leading news- 

 papers three times daily, can guarantee the utmost promptitude and correct, 

 ness of insertion to all Adverusements entrusted to them. 

 The Press Manual for 1879, containing a complete List of Newspapers 

 published in the United Kingdom. Post free, 6d. ^ 



GEOLOGY AND MINERALOGY. 



JOHN TYM has ready for Sale, at low prices, Educational Collections 

 of Fossils, Rocks, and Minerals, specially arranged to illustrate th: text- 

 books of Lyell, Geikie, Bonney, Collins, Davies, Skertchley, Dana. Page, 

 Jukes, &c. Series of Specimens for School and College Museums aie alsa 

 suDolied at very reasonable prices. Catalogues post free. 



Postal Address :-CASTLETON, via SHEFFIELD. 



MICROSCOPE and BALANCES as MADE 



by \V. STONE, 44, Gloucester Street, Holborn (late Alaiiasthi; AITO 

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

 to turn one-twentieth of a grain ; or 401. Microscope. Puce List ot 

 Balances (Illustrated) post free. 



MINERALOGY AND GEOLOGY. 



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

 including Special Collections to iUustrate the various Text-books. 

 Cabinets! List of Sections of Rocks for the Microscope. Blowpipe Aj ; 

 rams ar.d Materials of all kinds in Cases or separately. New Patterns 

 Geolodcal Hammers, with prices. List of New and Second-hand Books ^r 

 JAMES R. GREGORY, 

 MUSEUM OF GEOLOGY, 



88, CHARLOTTE STREE T, FITZROY SQUA RE. 

 1»ilNERALS, ROCKS, AND FOSSILS. 



COLLECTIONS IN CABINETS. 



Two Hundred Specimens, 40J. ; 150 do., 301. ; 100 do., xs. ; 50 do.. loi. 

 Siie of Specimens. 2 square inches. Nammg and Localities guaranteed. 



Superior Cabinets fitted with Card-Trays and Catalogue included. 



" 1 he Popular Scientific Pocket Cabinet Senes compnses 9 Cabinets : 

 224 Specimens. 2i. 6d. each Cabinet, free delivery, 4rf. (See Nati 

 March 13, No. 489. page 447.) , „ , , .„ „ 



The Collector's Field Apparatus complete, 2rj. Hammer-holder a., . 

 Waist-strap, price 2S. CoIlecting-b.-ig (figured and descnbed), pnce 4i. 



THOMAS J. DOWNING, Geologist, &c., 



38, WHISKIN STREET, LONDON, E.C. 

 Catalogue, Lists, and "Quarterly Circular" free on receipt of id. postag 



