June 29, '905] 



NA TURE 



PHCENIX 



ASSURANCE COMPANY. LIMITED. 



FIRE OFFICE. 



19 LOMBARD ST., E.G., and 57 CHARING CROSS, S.W. 



Established 1782. 



Moderate Rates. Absolute Security. Ellectrlo 



Llghtlngr Rules Supplied. Liberal Loss Settlements. 



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ORWAY, 



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— S.Y. "MIDNIGHT SUN." 



3,178 Tons. Two Berth Cabins. All Berths 

 on same level. Finest yachting steamer afloat. 

 Sailing July 8, 2r ; August 5, 19. 



Apply ALBION S.S. CO., LTD., 



Newcastle-on-Tyne. 



ALBERT EDWARD JAMRACH 



(Late CHARLES JAMRACH), 

 NATURALIST, 



180 ST. GEORGE STREET EAST. 



Implements of Savage Warfare, Idols, Sacred Masks, Peruvian Pottery, 

 Netsukis China, Lacquers, Gongs, Shells, and other Curios. 



ROCKS, MINERALS, FOSSILS. 



For Collectors, Students, Technical Schools, Colleges, &e. 



COLLECTIONS IN POLISHED DEAL BOXES. 



IS Specimens, 5/6; 50 do., 10/6; roo do., 21/-; 200 do., 42/- 



20 Coal Measure Rocks and Fossils, 12/6; do., larger, 15/-. 



Adapted for the Board of Education Examinations In 



Geology, Physiography, and Mineralogy. 



4 largt stock of MintraU, Rocks, Fossils and Microscopic Objtcts fot 



stlection. Sptcimtns sint on approval. 



Cabinets, Geologists' Hammers, Chisels, Card Trays, Glass-capped 



Boxes. Models of Crystals, &c., &c. 



NEW CATALOGUE POST F REE. 



rHOMAS D. RUSSELL. 78 Newgate St.. London. EC. 



MIOROSGOPIGAL PETROGRAPHY. 



3entlemen interested in the above study are invited to send to 



JAMES R. GREGORY & CO., 



I Kelso Place, Kensington Court, London, W., 



for a Prospectus of 



THE TWENTIETH CENTURY ATLAS OF 



MICROSCOPICAL PETROGRAPHY, 



low being issued in Twelve Monthly Parts, each P.irt containing Four Fine 



Half. Tone Plates, and also Four .actual Rock Sections. 

 Subscription In advance, either Monthly, 7/-: Quarterly, 21/-. 

 jr for the whole Series of 1 2 Monthly Parts & 48 Sections. £4 4s. 



LIVING SPECIMENS FOR 

 THE MICROSCOPE. 



Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphaerium, 

 Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many 

 ither specimens of Pond Life. Price ii. per Tube, Post Free. Helix 

 jomatia, Astacus, Amphioxus, Rana, Anodon, Stc, for Dissection purposes. 



THOMAS BOLTON, 



as BALSALL HEATH ROAD. BIRMINGHAM 



MARINE BIOLOGICAL ASSOCIATION 



OF THE UNITED KINGDOM. 



THE LABORATORY, PLYMOUTH. 



The following animals can always be supplied, either living 

 or preserved by the best methods : — 



Sycon ; Clava, Obelia, Sertularia ; Actinia, Tealia, Caryophyllla, Alcy 

 juium ; Hormiphora (preserved) ; Leptoplana ; Lineus, Amphiporns, 

 Nereis, Aphrodite, Arenicola, Lanice, Terebella ; Lepas, Balanns, 

 3ammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Eledono 

 Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echiuos 

 ■Kscidia, Salpa (preserved), Scyllium, Raia, &c., &c. 



For prices and more detailed lists apply to 



Biological Laboratory. Plymouth. THE DIRECTOR. 



THE NEW COLLECTION OF 



336 SPECIMENS AND SLIDES OF ROCKS, 



according to H. ROSENBUSCH: "Elemente der 

 Gesteinslehre, 2d ed. 1901." 



Accompanied by a text-book: ^^ Practical Pctvograpliy'' givinR a short 

 description of the polarizing microscope and its application, and also of the 

 macroscopical and microscopical features of every specimen of this collec- 

 tion, by Professor Dr. K. Busz of the University of Miinsrer. This 

 collection is intended for the practical use of students, and contains typical 

 representatives of all important types of rocks; it is composed of 277 

 massive rocks (94 deep. seated rocks, 5c dike rocks, 133 volcanic rocks), 

 28 sedimentary, and 3r crystalline schists. Out of it two smaller collections 

 of 250 and 165 specimens have been selected. The prices are as follows ; — 

 Collection I. 336 Specimens of Rocks ... 380 Marks. 



la. 336 Slides 420 



II. 250 Specimens of Rocks ... 270 



Ila. 250 Slides 310 



III. 165 Specimens of Rocks . 170 

 Ilia. 165 Slides 205 



COLLECTIONS OF MINERALS, FOSSILS, METEORITES, 

 PURCHASED FOR CASH OR EXCHANGED. 



The fifth edition of Catalogue No. 4, Petrography, has just 

 been published (210 pages), and will be sent free of charge on 

 application. 



Dr. F. KRANTZ, 



RHENISH MINERAL OFFICE. BONN-ON-RHINE, GERMANY. 



ESTABLISHED rSsj. 



WATKINS & DONCASTER, 



Naturalists and Manufacturers of 



CABINETS AND APPARATUS 



SPECIAL SHOW-ROOM FOR CABINETS. 



N. B. — For Excellence and Superiority of Cabinets and Apparatus, refer- 

 ences are permitted to distinguished patrons, Museums, Colleges, &c. 



A LARGE STOCK OF INSECTS, BIRDS' EOOS AND SKINS. 



SPECIALITY.— Objects for Nature Study, Drawing 



Classes, &c. 



Birds, Mammals. &c.. Preserved and Mounted by First-class 



Workmen true to Nature. 



All Books and Publications on Natural History supplied. 



36 STRAND, LONDON, W.C. 



(Five Doors from Charing Cross.) 

 ^fT Netv Catalogue {,lQ*i 7>p.) Just iasued^ jiost free. 



MINERALS, ROCKS, FOSSILS. 



A large stock of BRITISH AND FOREIGN MINERALS .ilways on view. 



A SPECIALITY. 

 Special display for Teachers and Students on Saturdays. Open till 7 p.m. 



RICHARDS' SHOW ROOMS, 



3 Beauchamp Place, Brompton Road, South Kensington, 

 London, S.W. 



CUTTELLS ROCK CUTTING MACHINE 



is the most simple and practical for section cutting, .^c. , £i 15^. 

 Prize Medal Exhibition of Inventions.— 19 Abbotstone Road, Putney, 

 S.W. 



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