cxxxiv NATURE [Augtisi 21, iSyg 



BEYCB-WEIQ-HT, 



MINERALOGIST, GEOLOGIST, CONCHOLOGIST, 



AND 



EXPERT IN GEMS AND PRECIOUS STONES, 



90, GREAT RUSSELL STREET, BLOOMSBURY, LONDON, W.C. 



MR. BRYCE-WRIGHT has the honour of calling the attention of the Scientific World to the recent additions to his 



valuable and extensive Collection. 



GEMS., —The magniiicent and unique gem known as the " Maxwell-Stuart" Topaz (sec Mi'n. Mag. xiii. 79, Plates II T. and IV.)- This extraordinanr 

 stone is undoubtedly the largest cut precious gem in the known world ; weight, i,475'9 grains, or 368 carats 3^^ grains, specific gravity, 3'5685. It 

 was found in Ceylon, cut and polished by Mr. Bryce-W right, occupying twenty-eight days of incessant labour. The " Kriloff " Series of Cut 

 Aquamarines, Yellow Sapphires, Alexandrites (green by day and red by night). Diamonds of fancy colours, Jar^oons of every hue, Tourmalines, 

 Sapphires, Emeralds, Topazes, Rubies, Cats-eyes, Andalusites, Carbuncles, Jacinths, Peridots, Euclases, Spinels, Diopsides, Phenakites, Moonstones, 

 and a large series of Cairngorms, one weighing 52 ounces or 7,878 carats. 



M INERAL-S.— One of the finest Crystals of blue Siberian Topaz known. Height, 5 inches; width, 6 inches; moFt beautifully terminated. 

 Series of smaller Topazes, single and in groups ; Beryls, Dioptase, Perofskites, Native Silvers, Golds, and English Minerals of every description. 



p" O S S ! L. S - — An unique specimen of the Hybodns Delabechei, Charlesworth, from the Lower Lias of Lyme Regis. Tliis remarkable specime . . 

 was discovered by Ed. Higgins, Esq., and the late Miss Aiming, and formerly belonged to the late Mr. Waring, A remarkable specimen of the 

 Chelonia Iloffmanni from Maestricht. Very fine Teleosauri and Ichthyosauri. A large Series of Fossils from all formations. 



SHE l_ L.S. — Rostellaria Ptnvist, Volnta Jnnonia, Conu^ crocaius, &c., &c. 



STONE IMPLEMENTS .—A remarkable and extensive Collection from Spain, Denmark, Sweden, Swiss Lake-dwellings, &c., &c. 



BRONZE IMPLEMENTS of every description. -. 



ELEMENTARY COLLECTIONS. 



Particular attention is drawn to the Elementary Collections which obtained the 07ily Prize Medal at the London and Paris Exhibitions. 



NEW ILLUSTRATED CATALOGUE, PRICE ONE SHILLING. 

 DIAMONDS AND OTHER PRECIOUS STONES. 



In consequence of the many spurious gems now being offered for sale, Mr. Br>ce-\Vright is prepared to give a SCIENTIFIC GUARANTEED OPINKJN 



upon all gems, mounted or unmounted, submitted to his inspection. 



B R YC E-W R I G H T , 



MINERALOGIST, AND EXPERT IN GEMS AND PRECIOUS STONES, 

 go, Great Russell Street, Bloomsbury, London, 'W.C. 



JAMES HOW & CO., 



SUCCESSORS TO GEO. KNIGHT & SONS, 



n, FARRINGDON STREET, LONDON, 



LATE OF 2, FOSTER LANE, AND 5, ST. BRIDE STREET, 



CHEMICAL, PHYSICAL, AND GENERAL SCIENTIFIC INSTRUMENT MAKERS. 



now and CO.'S series of Geological Illustrations for the Lantern are indispensable to Lecturers upon Geology. Lists on 

 application. 



ROCK SECTIONS, IGNEOUS, METAMORPHIC, AND SEDIMENTARY, FOR MICROSCOPICAL 

 INVESTIGATION. — A large assortment kept in stock, consisting of Granites, Syenites, Porphyries, Trachytes, Andedtes, 

 Rhyolites, Diorites, Gabbros, Dolerites, Basalts, Pitchstones, Obsidians, Schists, Serpentines, Limestones, &c. 



HOW'S MICROSCOPE, ADAPTED FOR THE INVESTIGATION OF ROCK STRUCTURES, with 

 Concentric Rotating Stage Polariscope Condenser, Jinch, i-incli and 2-inch Object Glasses in Case, £\o \os. 



HOW'S STUDENT'S MICROSCOPE, ;^5 5^. 



HOW'S MICROSCOPE LAMP. THE MINIATURE MICROSCOPE LAMP. 



SIR JOHN LUBBOCK'S NEW BOOKS. 



SCIENTIFIC LECTURES, with Coloured Plate and numerous Illustrations. 8vo. 8.f. (^d. 



CONTENTS. 

 ■ I. — On Flowers and Insects. 

 II. — On Plants and Insects, 

 III.— On the Habits of Ants. 

 IV. — „ ,, (continued). 



V. — Introduction to the Study of Prehistoric Archseology. 

 VI. — Address to the Wiltshire Archa;ological and Natural History Society. 



ADDRESSES, POLITICAL AND EDUCATIONAL. 8vo. 8^. td. 



Contents. — On the Imperial Policy of Great Britain— On the Bank Act of 1844— On the Present System of Public School 

 Education, 1876 — On our Present System of Elementary Education — On the Income Tax — On the National 

 Debt— On the Declaration of Paris — Marine Insurances — On the Preservation of our Ancient. National 

 Monuments — Egypt. 



MACMILLAN & CO., LONDON. 



