Atl07lSl 28, 1S79] 



NATURE 



cxliii 



DIAMONDS AND OTHER PRECIOUS 



STONES. Scientific opinion givenas to GENUINENESS, PURiTY 

 and VALUE.— Bryck Wright, 90, Great Russell Street, Londoo. 



FOR SALE.— INDIAN ELEPHANT 



SKELETONS, two monsters, nearly twelve feet high, one macerated 

 the other not ; one has tusks valued at Rs. 400 ; to be sold, a bargain. 

 Can be seen at 6, Somerset Villas, Lordship Road, Stoke Newingt»n, 

 London. 



Several Skins of Elliott s Pheasant on hand. 



EQUATORIAL TELESCOPE for SALE, 



very cheap. — 35 object-glass, several eye-pieces, finder, rackwork stand, 

 unusually strong, perfect condition. — Address Astra, care o£ the Pub- 

 lishers of Natuke, 29, Bedford Street, Strand, W.C. 



CASTLETON, DERBYSHIRE. 

 JOHN TYM 



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

 greatly improved Educational Collections at verj' Low Prices. 



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

 Postal Address— 

 CASTLETON vid SHEFFIELD. 



" BRITISH ASSOCIATION, 1879. 



CASTLETON, NEAR SHEFFIELD. 



The district of which Castleton is the centre is one of the most romantic 

 in the Peak. The Peveril Castle, the Peak Cavern, the *' Shivering Moun- 

 tain," Mam Tor, the Pass of the Winnatts, and many other ^lens, caverns, 

 and hills, with the ossiferous caves, present varied objects of interest Mr. 

 John Tym (who is Assistant Curator of the Castleton Museum, the property 

 of Rooke Pennington, Esq.) has a great number of the fossils and minerals 

 Srom the locality on sale (mcluding teeth, &c , of the pleistocene mammalia), 

 and has also a most extensive collection of geological specimens from all 

 parts of the world. Members of the Association will find his stock well 

 worth a visit and his prices very reasonable. 



Catalogues Post-free. 



MINERALOGY AND GEOLOGY. 



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

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

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

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

 Oeological Hammers, with prices. List of Naw and Second-hand Books of 



JAMES R. GREGORY, 



MUSEUM OF GEOLOGY, 



88, CHARLOTTE STREET, FITZROY SQUARE. 



GEOLOGY OF WEYMOUTH AND 

 PORTLAND. 



By R. DAMON, F.G.S. 



With Coast Vievs, Sections, Figures of Fossils, and Notes on the Natural 

 Historj' of the Coast. 



Price 3J. («/., or with Geological Map, 5*. Post free. 



MUSEUMS AND COLLECTORS. 



Mk. DAMON, of WEYMOUTH, will forward an 

 ibridged Catalogue of his Collections in SHELLS 

 ■{British and Foreign), FOSSILS, MLNERALS, and 

 other NATURAL HISTORY Objects,'recent and fossil, 

 and of which he has typical and other sets in the Loan 

 and Educational Museums of South Kensington. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO. 17. ANN STREET. BIRMINGHAM. 



T. B. hai last week posted to his subscribers a fresh-water Alga with 

 sketch and description. He has also sent out Leptodcra hyalinay Hytxlo- 

 dnphnia kaklhi-rgenst's, Lacinularia socialls^ Cotwchilus volvox^ &c. 



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

 is supplying. 



Specimen Tube, One Shilling, post-free, 



Ttv(nty-six Tubes in course 0/ Six Months for Subscription c/ £1 is. 



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



Portfolio of Drawings, One Skilling. 



MINERALOGY AND GEOLOGY. 



COLLECTIONS TO ILLUSTRATE THE ABOVE SCIENCES, 

 FROM 4 J. 

 SINGLE SPECIMENS FROM 3^. 



DIOPTASE, ZIRCON, RUBELLITE, XANTHOPHYLLITE, 

 SIBERIA. 

 KlilLHAUlTE, PYROCHLORE, APATITE, NORWAY. 

 A SMALL QUANTITY OF THORITE AND ORANGITE, VERY 

 RARE. 



BLOWPIPE CASES, HAMMERS AND CHISELS, AND CRYS- 

 TAL HOLDERS. 



PRIVATE LESSONS AND EVENING CLASSES. 

 SAMUEL HENSON, 

 277 (Late liza), STRAND, LONDON, W.C. 



MINERALS, ROCKS, AND FOSSILS. 



COLLECTIONS IN CABINETS. 



Two Hundred Specimens, 4&r. ; 150 do., 30J. ; 100 do., aoj. J 50 do., lof. 

 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 9 Cabinets and 

 204 Specimens. 2S. 6d. each Cabinet, free delivery, ^d. ^ee Nature, 

 March 13, No. 489, page 447.) 



The Collector's Field Apparatus complete, 21J. Hammer-holder and 

 Waist-strap, price 2j. Collecting-bag (figured and described), price 4J. . 



THOMAS J. DOWNING, Geologist, &c., 



38, WHISKIN STREET, LONDON, E.C. 

 Catalogue, Lists, and " Quarterly Circular " free on receipt of 2d. postage. 



Mn TENNANT, F.G.S., Professor of 



Mineralogy and Geology, Mineralogist by Appointment to Her Majesty 

 awl the Baroness Burdctt-Coutts, 149, Strand, London, W.C., having 

 been fifty years in business, contemplates shortly RETIRING, and 

 offers for SALE several of his extensive COLLECTIONS of Minerals, 

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

 Establishments, Provincial or Colonial Museums, or for the Private 

 Study of any Scientific Person wishing to become acquainted with the 

 above-mentioned Sciences. From j£i,ooo to 5,000 Guineas. Students' 

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



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, F.G.S., Shekrnkss-on-Ska, h.tvine a large 

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

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

 named, 2S, Not less than 50 sent at these rates. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Cu-clcs, ji- ^^- P*"^ ounce ; Squares, 

 2f. gd. ; post free ad. extra ; Ground edged Slips, 5J. per gross ; also 

 ot'ier Mounting Materials and Objects prepared for mounting.- CH AS. 

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



ELECTRICAL, SCIENTIFIC, & PHOTO- 



GRAPHIC APPARATUS.— Electric Bells, Fire ard Thief Alarms, 

 and Automatic Switches. Induction Coils, Frictional Machines, Lamps, 

 and Batteries. Microphones, Wires, Magnets, Carbons, and all Mate- 

 rials. Repairs and Alterations. New Illustrated Descriptive Catalogue, 

 one Stamp. Cameras, Dry Plates, Sensitive Paper, and all Chemicals. 

 Photo. List free.— DALE & CRAMFl'ON, Manufacturing Opticians, 

 4, Little Britain, London, E .C. 



LA SEMAINE FRANCAISE : a Weekly 



Newspaper and Review in the French Language. PoUtici, Literature, 

 Science, Art, Varieties, Notes. Price ^i. , through booksellers, and at 

 the railway bookstalls. Office, 37. Soutliampton Street, Strand, W.C. 



LA SEMAINE FRANCAISE: Journal Fran^aise pour 



I'Angletcrre : Politique, Liit^rature, Sciences, Arts, Vari^t^s, Nouvelles, 

 et Notes. Un cxemplaire par la poste, 4J</., en timbres posie. Abonne- 

 ment franco par la poste — un an, iZs. \ six mois, gj. gd. Piix 4^., chei 

 tous les libraires et aux gares des chemins de fer. On s'abonne aux 

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



LA SEMAINE FRANCAISE.— "'La Semaine Fran- 



^aise ' has been brought out in London for the benefit of those English 

 readers who may wish to study contemporary French from all points of 

 view, instead of confining their reading to one particular GalUc print. 

 It certainly merits success."— Crw/Zj/f. 



LA SEMAINE FRANCAISE.— " Tel est le titre d'un 



journal hebdomadaire, nous pourrions dire d'une revue de tous les jour- 

 naux franyais accr^ditijs. Ce journal rdunit, sous le mcnie couvert, 24 

 ou 32 pages grand format, et dans ces pages sont publics, en fran^ais, 

 les meilleurs articles, poUtiques, critiques, et litt^raires, qui ont paru 

 pendant la semaine dans les joumaux de Paris. Assur^meiit le numero 



?iue aous avons sous les yeux est un excellent specimen de ce que pent 

 aire un heurcux choix, guide par une intelligence parf aite de ce qui pcut 

 int^resser les \ectt\xrs."—Nouvelie Chronigue de jersey. 



LA SEMAINE FRAN QAISE.— "The numbers before 



us are full of good things It will be far belter for most than any 



one of the best papers published in Paris itself. We arc much oleased 

 with the character of it, and believe it will be hichly valued in all those 

 many households where French is cultivated. 'Ine printing is very w«U 

 done."— ^K««. 



Tksms op Subscription:— f. d, 



lluee months ^ ^ »^ .^ 5 o 



Six ,, ,„ »M •>• *» *.• ••• 9 9 



Twelve „ ... ». w ». 18 o 



P.O.O. payable to T. Spanswick, at King Street, Covent Garden. W.C 

 Tublishing Ofl&ce, 37, Southampton Street, Strand, W.C, 



