Oct. 30, 1879] 



NATURE 



ccxv 



^a U tg Auc tion. 



Natural History Specimens, Mahogany Cabinets and Book-Cases, Photo- 

 graphic Apparaius, Books, &:c. 



Mr. J. C. STEVENS will Sell by Auction, 



at his Great Rooms, 38. King Street, Covent Garden, on FRIDAY, 

 7th of November, at half-past 12 precisely, a fine Collection of Natural 

 History Specimens: Bird ikins from New Guinea, Australia, New 

 Zealand, West Africa, Centrnl and South America; British and Foreign 

 Coleoptera ; rare Lepidupiera from Central and South America ; Shells, 

 Mahogany Cabinets and Book-cases, Iron Safe, Photographic Appara- 

 tus, Furniture and Glass Shades and Frames, Bright Bird Skins and 

 Insects for Piumassiers, Insects for Jewellery, Plumes, Panires, &c., &c. 

 May be viewed the Morning of Sale, and Catalogues had. 



ELECTRIC BELLS AND HOW TO FIX 



THEM. Post free 6 Stamps. Price Lists of Electric Bells post free. 

 J. & \V. E. ARCH BUTT, 8, Bridge Street, Westminster, S.W. 



ADAM HILGER, 



Scientific Instrument Maker to the Royal Observatories 



of Greenwich and Edinburgh, the Observatories of 



Melbourne, Sydney, Potsdam, dr'c., Sr'c. 



192, TOTTENHAM COURT ROAD, LONDON. 



Direct Vision Spectroscopes with adjustable slit and high dispersive power, 

 in Brass Case for waistcoat pocket, price £i ss. Ditto, large sizes, ^2 and 

 ^2 los. With Quartz Lenses, ics. extra. Table Spectroscopes for Students, 

 trom jCj los. Ditto, with 2 Prisms and divided Circle, from ^ 15. Half Prism 

 Spectroscopes with very high dispersive power equal to 15 Prisms of 60°, 

 on Brass Stands with Universal motion, complete in case, price from ^40, 

 Hilger's Variable Power Prisms for Spectral Analyses, with 6 different 

 powers, from 1° to 10°, from A to H, of light flint, price, in case, /^s loj. 

 Ditto, with extra dense flint and a power from 1° to 25°, from At o H, price 

 ^10 los. Sph erometers, in Morocco Case, from £5 \os. 



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, carriage paid, to London, 

 on receipt of los,; or one small Specimen each of 12 Species, post-free 

 for I J. 2(/., by 



W. H. SHRUBSOLE, F.G.S., Sheemess-on-Sca. 



MINERALOGY AND GEOLOGY. 



COLLECTIONS TO ILLUSTRATE THE ABOVE SCIENCES, 

 FROM 4s. 



SINGLE SPECIMENS FROM 3^. 



PEROFSKITES, WAVELLITE, GENICULATED CRYSTALS OF 

 RUTILE, BROOKITE, QUARTZ CONTAINING LIQUID, CORUN- 

 DUM, FINE ; AMERICA. AUGITE, CHONDRODITE, MICRO- 

 Ct.INE, PYROCHLORE ; NORWAY. THORITE with ORANGITE, 

 ALSO EUXENITE FOR CHEMICAL PURPOSES. BLOWPIPE 

 CASES, HAMMERS, CHISELS, AND CRYSTAL HOLDERS. 

 PBIVATE LESSONS AND EVENING CLASSES. 



SAMUEL HENSON, 

 277 (Late 113a), STRAND, LONDON, W.C, 



GEOLOGY AND MINERALOGY. 



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

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

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

 Jukes, &c. Series of Specimens for School and College Museums are also 

 supplied at very reasonaole prices. Catalogues post free. 



Postal Addresi :— CASTLETON, via SHEFFIELD. 



MINERALS, ROCKS, AND FOSSILS, 



COLLECTIONS IN CABINETS. 



Two Hundred Specimens, 40J. ; 150 do., 30J. ; 100 do., aar. ; 50 do., los. 

 Siie of Specimens, 2 square inches. Naming and Localities guaranteed. 



Superior Cabinets fitted with Card-Trays and Catalogue included. 



** '1 he Popular Scientific Pocket Cabinet Series " comprises q Cabinets and 

 334 Specimens. 2s. 6d. each Cabinet, free delivery, ^d, ^ee Nature, 

 March 73. No. 489, page 447.) 



The Collector's tield Apparatus complete, 21T. Hammer-holder and 

 Waist-strap, price sj. Collecting-bag (figured and described), price 4*. 



THOMAS J. DOWNING, Geologist, &c., 



38, WHISKIN STREET, LONDON, E.C. 

 Catalogue, Lists, and " Quarterly Circular ** free on receipt of 3*/. postag*. 



"MINERALOGY AND GEOLOGY. 



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

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

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

 ratus and Materials of all kinds in Cases or separately. New Patterns of 

 Geological Hanuners, with prices. List of New and Second-hand Books of 

 JAMES R. GREGORY, 

 MUSEUM OF GEOLOGY, 



38, CHARLOTTE STREET, FITZROY SQUARE, 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quaKty. Circles, «. td. per ounce ; Squares, 

 2j. 9if. ; post free ■2d. extra ; Ground edged Slips, 5*. per gross : also 

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

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



NATURAL HISTORY STORES. 



48, ESSEX STREET, STRAND, W.C. 



Students and others are invited to inspect THOMAS D. RUSSELL'S 

 Collections of British and Foreign Shells, Corals, Zoophytes, AnneLds. 

 Crustacea. Echinoderms, Minerals, Fossils, Rock Specimens, Microscopic 

 Objects, &c. 



Cabinets, Geologist's Hammers. Glass Capped Boxes, Card Trays, 

 Tablets, Glass Slips, Micro- Thin Glass, Canada Balsam, Marine Glue, and 

 other requisites for the Geologist and Microscopist. 

 Catalogues Post Frtt. 



ELECTRICAL and SCIENTIFIC APPA- 



RATUS. — MICROPHONES and HUGHES' SONOMETER. 

 ELECTRIC BELLS, INDICAT^JRS, Fire- and Thief-AIarms, New- 

 Constant Batteries. INDUCTION-COILS and FRICTIONAL 

 MACHINES, Magnets, Insulated Wires, Screws, and all materials. 

 Liberal Terms to Schools and Science Teachers. Apparatus 

 on hire. Complete Electric Catalogue, 2 stamps. Optical and Photo- 

 graphic List, I stamp. — DALE and CRAMPTON, Manufacturing 

 Electricians, 4, Little Britain, London, E.C. 



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 alt 

 weathers, from l^. 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. ELECfRIC LAMPS for lantern use, 

 ;^4 to ;£8 Zs., action Equalling the most costly. Cheaper Lamps. BEST 

 COILS, i-inch Spark, 75.?. New pattern Bells. Jars, Carbons, Clamps, 

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

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

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



MICROSCOPESandBALANCESasMADE 



by W. STONE, 44, Gloucester Street, Holbarn (late Alabaster and 

 Co.), are the best and cheapest. Try his ■>,■:$. Bo.k Balance, svarranted 

 t) turn one-twentieth of a grain; or 40*. Microscope. Piice List of 

 Balances (Illustrated) post free. 



NORTH BRITISH AGRICULTURIST, 



Is the only Agricultural Journal in Scotland, and circulates extensively 

 amongst landed proprietors, factors, farmers, farm-bailiiTs, and other*' 

 interested in the management of lauded property throughout Scotond aLd 

 the Northern CouHties of England. 



The AGRICULTURIST has also a very considerable circulation on the 

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



The AGRICULTURIST is pubhshed every Wednesday afternoon in 

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

 and Irish Markets of the week, besides telegraphic reports of those heid on 

 the day of publication. 



The Veterinary Department is edited by one of the leading Veterinarians 

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

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



FulIReports are given of the Meetings of the Royal Agricultural Society 

 of England, the Royal Agricultural Society of Ireland, Uie Highland ard 

 Agricultural Society of Scotland, the Scottish Chamber of Agriculture, 

 and all the principal Agricultural Associations throughout Great I3htain 

 and Ireland. 



For Advertisers addressing themselves to Fanners a better medium does 

 not exist. . , . , 



Price j/i. By pest, 3i</. Annual Subscnption, payable m advance, r^f. 



Office.— 377, mgh Street, Edinburgh. 



PostOffico Orders payable to Charles Anderson, Jan., Edinburgh. 



Established 1843. 



GARDENING ILLUSTRATED: a new 



Weekly Joum.al for all interested in Gardening in Town or Country. 

 Price i</r weekly. Profusely Illustrated. Flowers, Fruits, Vegelahles, 

 Town and Suburban Gardening, Villa Gardening, the Cottage Garden, 

 Window Gardening, Work in the Garden for every week. May be had 

 of all Newsagents and at the Book-stalls, \d. every Saturday. Post free 

 for twelve months for 6s. 6J. Specimen copy, ij</. in stamps. Office, 

 37, Southampton Street, Covent Garden. London. W.C. 



THE BEST FARMERS' NEWSPAPER. 



THE CHAMBER OF 

 AGRICULTURE JOURNAL 



AND FARMERS' CHRONICLE, 



Edited by John Ausernoh Ci.arkk, Secretary to the Central Chambei 



of Agriculture, 

 Devotes special attention to the discussions and proceedings of the Chamber 

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

 members), besides giving original papers on practical farming, and a mass o^ 

 intelligence of particular value to the agriculturist. 



The London Com, Seed, Hop, Cattle, and other MarkeU of Monday ar« 

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

 as to ensure delivery to country subscribers by the 6rst post on Tuesday 

 morning. Price 3d., or prepaid, 151. a year post free. 



Published by W. PICKERING si, Aiuodel Street, Strand, W.C. 



