March 20, 1879] 



NATURE 



civ 



ADVERTISING. 

 C H. MAY Sc C O., 



GENERAL ADVERTISING OFFICES, 



7S, GRACECHURCH STREET, LONDON, E.C. 



(The only Address.) 



ESTABLISHED 1846. 



Advertisements of every description received for issertion in all News- 

 papers, MagaxL^es, Reviews, &c., at the same rates as at the offices of the 

 papers. 



Estimates for General Advertising. Reduction for a series. 



Liberal terais to large advertisers. 



Advertisements are also recei%-ed for all newspapers, which may be ad- 

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

 required. 



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 Advertisements entrusted to them. 



The Press Manual, containing a complete List of Newspapers published 

 in the L'nited Kingdom. Post free, dd. 



THE 



iE5 ASTRONOMICAL TELESCOPE 



HAS A 3-INCH OBJECT-GLASS. 



Which shows the Ring of Saturn, Belts of Jupiter, and separates the 

 principal Double Stars. 



S. & B. SOLOMONS, 



61, PALL MALL, 



OPPOSITE M.4RLB0R0UGH HOUSE 



ENGRAVINGS AND ELECTROTYPES 



FuR S.\LE, at prices ranging from ir. to lOJ., in gxxi condition, ready for 

 printing. Small, medium size, and large engravings, comprising a great 

 variety of subjects, suitable for Publishers, Advertisers, and Amateurs. 

 Specimen of any subject required sent p-ost free on application. 



FACSIMILE OF SIGNATURE for jj. An exact copy of any name 

 guaranteed. These signatures beir.g engraved in bold relief, are useful for 

 Stamping Books, Circulars, and Documents, or Marking Linen, and made 

 type-high for ordinary Letterpress Printing. 



Sent p-jst free to any address on receipt of 36 stamps. 



75, FLEET STREET, LONDON, E.G. 



ARTISTIC— To Ladies and Gentlemen with 



some leisure time, desiring to supplement their incomes, an opportunity 

 is offered of acquiring the ART of DRAWING and ENGRAVING 

 on WOOD in a thoroughly satisfactory and perfect style. The terms 

 are moderate, and the hours can be made to suit the convenience of 

 pupils. Persons residing in the country can receive full instruction by 

 correspondence. For further particulars call or address Mr. J. Frank- 

 lin Nash, -\rtist and Engraver, 75, Fleet Street, Ljudon, E.C. 



FOR SALE. — Large Monocular Micro- 

 scope. — Mechanical Stage, Polaiiscope, Frog-plate, two Eye-pieces, 

 i-inch, J-inch, and J-inch Objectives and accessories for ;^I5. C., 11, 

 Bull Ring, Homcastle. 



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



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. 



THE BEST FARMER S' NEWSPAPER. 



THE CHAMBER OF 

 AGRICULTURE JOURNAL 



AND FARMERS' CHRONICLE, 



Edited by John Ai^gkrnon Clarkk, Secretary to the Central Chamber 



of Agriculture, 

 Devote* special attention to the discussions and proceedings of the Chamber 

 of Agriculture of Great Britain (which now number upwards o£ 18,000 

 meoiben), besides givmg original papers on practical farming, and a macg of 

 intelLgence of particulai value to the agriculturist. 



The Lindon Com, Seed, Hop, Cattle, and other Markets of Monday are 

 specially rep-irtcd in this Journal, which is despatched the same evening so 

 as to ensure dehvery to country subscribers by the first post on Tuesday 

 morning. Price yi., or prepaid, 15J. a year post free. 



Published by W. PICKERING 21, Anindel Street, Strand, W.C. 



LA SEMAINE FR/VNQAISE : a Weekly 



Newspaper and Review ia the French Language. Politics, Literafire, 

 Science, .\rt, Varieties, Notes. Price ^li. , through bjjlcsellers, and at 

 the railway bookstalls. O.Bce, 37, Southampton Street, Strand, W.C 



LA SEMAINE FRANgAISE: Journal Frangaise pour 



I'Angleterrc : Poliri-iue, Litterature, Sciences, Arts, Vari^t&, Nouvellcs, 

 et Notes. Un exemplaire par la p:>ste, 4|</., en timbres poste. Abonnc- 

 ment franca par la p>ste — un an, i3j. : six mois, gs. gJ. Prix ^d., chei 

 tous les libraires et aux gares dss chemins de fer. On s'ab^one aux 

 bureaux, 37, Southampton Street, Strand. Londres, W.C. 



L.A. SEMAINE FRANCAISE.— "'La Semaine Fran- 



gaise' has be in brought out .n Load>a for the benaSt o? those English 

 readers whj may wish to s;udy contempjrary Fre.ich fr jm all points of 

 view, instead of confining their reading to one pirticnlar Gallic prin:. 

 It certaialy merits success." — Graphic. 



LA SEMAINE FRANCAISE.— For all who reai and 



speak French. 



LA SEMAINE FRANCAISE.— For Teachers and 



Schools. 



LA SEMAINE FRANCAISE.— For General and 



Family Reading. 



LA SEM.AINE FRANCAISE.— « Tel est le litre d'un 



journal hebdomadaire, nous pourrions dire d'uae revue de tous les j ur- 

 naux fraacais accredites. Ce journal reunit, sous le meme convert, 24 

 ou 33 pages grand formit, et dans ces pages soat publics, en frangais, 

 les mei'.leurs artxles, poLtijue^ critiques et litteraires, qui ont paru 

 pendant la semaine dans les j ournaux de Paris. Assurcmeat le numero 

 que nous avjns sous les yeux est un excellent sp^cimea de ce que peut 

 feire un heureux choir, guide par une intelligence parfaite de ce qui peat 

 interesser les leoteurs." — SouveUe Chronique di jfersey. 



LA SEMAINE FRANCAISE.— "The numbers before 



us are full of gjod things It will be far better for most than any 



one of the best papers published in Paris itself. We are much pleased 

 with the character of it, and believe it will be highly vala«i in all thise 

 many households where French is cultivated. The printing is very well 

 done." — Queen. 



Terms qf Sl-bscriptios : — s. d. 



Three months ... ._ .« ... ... ... 5 o 



Six „ ...... ... ™ _ ... 9 9 



Twelve „ ..._... ... ... ... 18 o 



P.0.0. payable to T. S.'axswick, at King Street, Covent Garden, Wt^.C. 



NORTH BRITISH AGRICULTURIST, 



Is the only Agricultural Journal in Scotland, and circulates extensively 

 amongst landed proprietors, factors, farmers, farm-bailifis, and others 

 interested in the management of landed proi)erty throughout Scot.and and 

 the Northern CouHties of EnglaJid. 



The AGRICULTURIST has also a very consideiable circulatioa on the 

 Continent of Europe, America, Australia, and the Colonies. 



The AGRICULTURIST is published every Wednesday afternoon In 

 time for the evening mails, and contains Reports of all the principal British 

 and Irish Markets of the week, besides telegraphic reports of those held o* 

 the day of publication. 



The Veterinary Department is edited by one of the leading Veterinarian* 

 in the country, and is invaluable to the breeder and feeder as a guide to the 

 rearing of animals, and their treatment when labouring under H;<a'ac», 



Full Reports are given of the Meetings of the Rojral Agricultural Society 

 of Ejigland, the Royal Agricultural Society of Ireland, the Highland and 

 Agricultural Society of Scotland, the Scottish Chamber of Agriculture, 

 and all the principal Agricultural Associations throughout Great Bntain 

 and Ireland. 



For Advertisers addressing thouselres to Farmers a better me^iun doe> 

 not exist. 



Price 3^ By post, 3^. Annual Subscription, payable in advance, i4x. 



Office. — 377, High Street, Edinburgh. 



Post-Ofice Orders payable to Charles Anderson, Jan., Edinburgh. 



Established 1843. 

 THE "HANSA," 



PabEshed ance 1864, in Hamburg, is the only independent professional 

 paper in Germany, dedicated exclusively to Maritime Objects, Essays, 

 Cnriques, Reviews, Reports, Advertisements. Strict eye kept upon the deve- 

 lopment of Maritime Affairs in every respect. Every second Sunday one 

 Number in 4to at least ; frequent supplements and drawings. Subscription 

 at any time ; preceding numbers of tile year furnished subsequently. Price 

 i2». for twelve months. Advertisements ^d. a line, widely spread by this 

 paper; considerable abatement for 3, 6, 12 months' insertion. Business 

 Office : Aug. Meyer and Dieckmann, Hamburg, Alterwall, 38. Edited hj 

 W. V. Frbeden, M.R., Hamburg, Alexander Street, 8. 



THE BREWERS' GUARDIAN: 



A Fortnightly Paper devoted to the Protection of Breweis' Interest^:, 



Licensing, Legal, and Parliamentary Matters. 



RsvTKW or THE Malt ano Hop Trades ; and Wink and Spirit Tpadb 



Record. 



The Organ of the Country Brewos. 



" The Brewers' Guardian " is published on the evoiings of every-ahemate 



Tuesday, and is the only journal officially connected with brewing interests. 



Subscription, i6r. 6d. per annum, post free, dating from any quarter day. 

 Single CojHes, u. each. Registered for transmission abroad. 

 Offices -5, Bond Cboit, Walbrook, London E,C. 



