yuly 24, 1879] 



NATURE 



XCIX^ 



MINERALOGY AND GEOLOGY. 



COLT.ECTIONS TO ILLUSTRATE THE ABOVE SCIENCES, 

 ■FROM 4i. 



SINGLE SPECIMENS FROM %^. 



DIolTASE, ZIRCON, RUBELLITE, XANTHOPHYLLITE, 

 SIBERIA. 



KEILHAUITE, PYROCHLORE, APATITE, NORWAY. 



A SMALL QUANTITY OF THORITE AND ORANGITE, VERY 

 RARE. 



BLOWPIPE CASES, HAMMERS AND CHISELS, AND CRYS- 

 TAL Hi )LDERS. 



PEIVATE LESSONS AND EVENING CLASSES. 



SAMUEL HENSON, 



277 {Late wia), STRAND, LONDON, W.C. 



MINERALOGY AND GEOLOGY. 



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

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

 Cabinets. List of Sections of 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 SQUARE. 



CASTLETON, DERBYSHIRE. 

 JOHN TYM 



Has largely added to his stock of Fossils and Minerals, and Is now offering 

 greatly improved Educational Collections at very Low Prices. 



For full particulars see his Catalogue, sent post free on application. 



Postal Address — 



CASTLETON vid, SHEFFIELD. 



Mr! TENNANT, F.G.S., Professor of 



Mineralogy and Geology, Mineralogist by Appointment to Her Majesty 

 and the liaroncss Burdett-Coutts, 149, Strand, London, W.C., having 

 been fifty years in business, contemplates shortly RliTIRIN'G, and 

 offers for SALE several of his extensive COLLECTKJNS of Afinerals, 

 Rocks, and Fossils. /Hiey are well adapted for first-class Educational 

 Establishments, Provincial or Colonial Museums, or for the Private 

 Study of anjr Scientific Person wishing to become acquainted with the 

 above-mentioned Sciences. From ^i,ooo to 5,000 Gumeas. Students* 

 Collections at 2, 5, 10, 20, to 50 Guineas. 



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- 

 ▼ersity Matriculation, ist and 2nd B.Sc, PreHminary Scientific M.B., 

 Botany, Physiology, Chemistry. All the work practical. 



MINERALS, ROCKS, AND FOSSILS. 



COLLECTIONS IN CABINETS. 



Two Hundred Specimens, ^os. ; 150 do., 301. ; 100 do., x>s. ; 50 do., loj. 

 Sije of Specimens, 2 square inches. Naming and Localities gu-aranteed. 



Superior Cabinets fitted with Card-Trays and Catalogue included. 



" The Popular Scientific Pocket Cabinet Series " comprises 9 Cabinets and 

 234 Specimens. 21. 6d. each Cabinet, free delivery, ^d. (See Natike, 

 March 13. No. 489. page 4^7.) 



The Collector's Field Apparatus complete, 211. Hammer-holder and 

 Waist-strap, price 21. CoUecting-bag (figured and described), price 41. 



THOMAS J. DOWNING, Geologist, &c , 



38, WIISKIIN STREET, LONDON, E.C. 

 Catalogue, Lists, and " Quarterly Circulajr" free on receipt of id. postage. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, F.G.S.. Shkkrmhss-on-Ska, having a large 

 quantity of the above on hand, offers. FOR A FEW WEEKS ONLY, 

 100 good Specimens, correctly named, for 5J, ; too assorted Specimens, un- 

 named. Its. Not less than 50 sent at these rates. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best qualihr. Cycles, «. td. per ounce ; Squares, 

 IS. gd. : post free 2d. extra ; Ground edged Slips, $s. per gross : also 

 other Mounting Materials and Objects prepared for mounting.— CH AS. 

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



THE BREWERS' GUARDIAN : 



A Fortnightly Paper devoted to 'the Protection of Brewera' Interests, 



Licensing, Legal, and Parliamentary Matlen. 



Revixw of th« Malt anu Hop Tradks ; ano Wink and Spikit Tiadi 

 Record. 

 The Organ of the Country Erewen. 

 ••The Brewers' Guardian ' is published on the evenings of every alternate 

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

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

 Single Copies, is. each. Registered for transmission abroad. 

 Offices -s. Bond Court, Walbrook, Loodoo, E.C 



THE QUARTERLY REVIEW, 



No. 295, is published THIS DAY. 



Contents. 



L— THE ENGLISH MONARCHY. 

 II.— DEAN HOOK. AND BISHOP SELWYN. 

 III.— MUSIC AND MUSICIANS. 

 IV.— COUNT CAVOUR. 



v.— HEREFORDSHIRE. 

 VI.— POLYBIUS AND HIS TIMES. 



VII.— GLACIAL EPOCHS AND WARM POLAR CLIMATES. 

 VIII.— WHY IS SCOTLAND RADICAL? 

 IX.— THE IRISH UNIVERSITY BILL. 



JOHN MURRAY, Albemarle Street. 



THE 



Price 4*/. 



TELEGRAPHIC 



JOURNAL 



ELECTRICAL REVIEW 



For July 15th, 1879, contains:— 

 Leader : William Fothergill-Cooke. 



Muirhead and Winter's Quadrnplex System (for Land- Lines). (Illustrated.) 

 The New Form of Leclanche' Battery. By Dr. H. Tobler, Professor of 



the Zurich Polytechnic School. 

 Theiler's Patent Mechanical Duplex (for Land-Lines). (Illustrated.) 

 Light from Electricitj'. 

 Hickley's Electric Candle. (Illustrated.) 

 Edison s Electric Light. 

 Distributing Electric Light. (Illustrated.) 

 Correspondence. 

 Notes. 

 Review. 



New Patents — 1S79. 

 South African Telegraphy. 

 Proceedings of Societies. 

 General Science. 

 City Notes. 



HAUGHTOX & CO., 10. Paternoster Row, London. 

 XHiC BEST FARMERS* NEWSPAPER. 



THE CHAMBER OF 

 AGRICULTURE JOURNAL 



AND FARMERS' CHRONICLE, 



Edited by John Algernon Clarke, Secretary to the Central Chamber 



of Agriculture, 

 DevotM tpecial attention to the discussions and proceedingi of tht Chamber 

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

 members), besides giving original paper* on practical fanning, and a mass of 

 intelligence of particulai value to the agriculturist. 



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

 specially reported in this Journal, which is despatched the same evening to 

 as to ensure deUvery to country subscribeii by the first post on Tuesday 

 morning. Price 3(/., or prepaid, 15*. a year post free. 



PubUshed by W. PICKERING, 21. Arundel Street, Strand, W.C. 



THE **HANSA," 



Published since 1864, in Hamburgj is the only independent professional 

 paper in Germany, dedicated exclusively to Maritime Objects. Es?ays, 

 Critiques, 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 the year furnished subsequently. Jnice 

 I2J. for twelve months. Advertisements 4*/. a Hne, widely spread by this 

 paper; considerable abatement for 3, 6, 1^ months* insertion. Business 

 Office : Aug. Meyer and Dieckmann. Hamburg, Alterwall, aS. Edited bj 

 W. V. Frkedhn, M.R., Ilaniburg, Alexander Street, 8. 



NORTH BRITISH AGRICULTURIST, 



Is the only Agricultural Journal in Scotland, and circulates extensively 

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

 interested in the management of landed property throughout Scot.and At d 

 the Northern Counties of England. 



The AGRICULTURIST has also a very considerable 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 o£ those held en 

 the day of publication. 



The Veterinary Department \t edited by one of the leading Veterinarians 

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

 rearing of animals, and their treatment when labouring under disease. 



Full Reports arc given of the Meetings of the Royal Agricultural Society 

 of England, the Royal Agricultural Society of Ireland, ^e Hight.-uid ard 

 Agricultural Society of Scotland, the Scottish Chamber of Agricultute, 

 and all the principal Agricultural Associations throughout Great Britain 

 and Ireland. 



For Advertisers addressing them«elves to Farmers a better medium toes 

 not exist. 



Price yi. By pott, 3^^/. Annual Subscription, payable in advaneSi 14/, 



Office. — 377, High Street, Edinburgh. 



Post-Office Orders payable to Charles Anderson, Jun., Edinbur&h. 



Established 1843. 



