October 28, 1909] 



NA TURE 



ccli 



I. MINERALOGY. 



Our new MINERALOGICAL SUMMER-TERM LIST No. 9 gives a 

 ■short survey of (he laiesl additions to our stock of new and especially 

 Tcmarkable mtnetals ; finest large specimens for museum ^how-cases, &c. 



Great supply of most beautiful new specimens nnd lar^e crystals of 

 Benitoite and CarlOSite ; magnificent crystals of Rubellite froTn Bra/'l 

 '(new recurrence); DiaiTiantS from th-^ new finds in (jeinian Soulh West 



Africa; choice Ural and Japan Minerals : Topaze, Emerald, 

 Pyrrhite, Copper Pyrites (Groth Zeitschr. XLIII.. p- 47). Danburite, 

 Epidote, Naegite, &c. 



THE CULLINAN DIAMOND. 



Imitation in finest crystal glass, showing the natural colour and form. 



Price 8s. 6d. Imiiations of the nine large brilliants cut from the 

 •Cullinan Diamond, in flegant case. £i lOs. 



New Collections of Polished Mineral Sections for optical pur- 

 poses, neatly mounted ; special Price List just nut, sent free on application. 



Established 1811. 



Established 185-5. 



II. PAL/EONTOLOGY. 



The new PAL^ONTOLOGICAL SUMMER-TERM LIST No. 34 has 



just been published, and gives all particulars as to numerous additions to 

 our enormous stock of fossils. 



1. Palseobotany ; preparations of plants from the Devonian and 



Carbonian ; r.-Eniopteris from Asia Minor. 



2. Invertebrata : Bosporus - Trias and Devonian; magnificent 



Ancylnceras gigas from the English Gault. 



3. Vertebrata: Capitosnurus, Mystriosauru«, Ichthyosaurus, &c. . 



excellent specimens. Lepidotus elvensjs, Ursus spelreus, &c. 



Dr. F. KRANTZ, 



RHENISH MINERAL OFFICE, BONNON-RHINE, GERMANY. 



MINERALOGY, GEOLOGY & PETROLOGY. 



Single Specimens and Collections 



for Prospectors, Teachers and Students. 



Rock Sections, Weil-cut. Fossils from all Formations. 



Metallic Ores from all Parts. Minerals for Chemical Purposes. 



LISTS FREE from— 



JAMES R. GREGORY & CO., Mineralogists, 

 139 FULHAM ROAD, SOUTH KENSINGTON, S.W. 



Telephone No. 2S41 Western. Tel. Add., " Meteorites," London. 



LIVING SPECIMENS FOR 

 THE MICROSCOPE. 



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

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

 other specimens of Pond Life. Price 1,1. per Tube, Post Free. Helix 

 pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes- 



THOMAS BOLTON, 



25 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, Caryophyllia, Alcy- 

 onium ; Hormipbora (preserved) ; Leptoplana ; Lineu?, Amphiporus, 

 Nereis, Aphrodite, Arenicoia, Lanice, Terebella ; Lepas, Balanu*. 

 Gammarus, Ligia Mysis, Nebalia, Carcinus ; Patella, Buccinum, Eledone, 

 Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echinus, 

 Ascidia, Salpa (preserved), Scyllium, Raia, &c., &c. 



For prices and more detailed lists apply to 



Biological Laboratory, Plymouth. THE DIRECTOR. 



WATKINS & DONGASTER, 



Naturalists and Manufacturers of 



CABINETS AND APPARATUS 



FOR ENTOMOLOGY, BIRDS' EGGS AND SKINS, AND ALL 

 BRANCHES OF NATURAL HISTORY. 



SPECIAL SHOW-ROOM FOR CABINETS. 



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

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



A LARGE STOCK O F INSECTS, BIRDS' EGGS AND 5KINS. 



SPECIALITY Objects -for Nature Study, 



Drawrins 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 fiom Charing Cross.) 

 %JF- CATAr.OCrUK (lO'J pp.) fOST VREE. 



ETHNOGRAPHICAL SPECIMENS.! 



Selection of over 16,000 g^fcanteed 

 genuine Savage Weapons, Ornaments, Im- 

 plements, Idols, etc.. &c., each accurately 

 localized and named. 



General Catalogue free. Monthly Illus- 

 trated Catalogue, 6d,, per year, 5/6. 

 Specimens bought or exchanged. 

 W. 0. OLDMAN, 

 Hamilton House. Brixton HiU, London. 



GLASS BLOWING 



ALL KINDS OF SCIENTIFIC AND EXPERIMENTAL GLASS 



BLOWING carried out quickly and correctly from rough sketch 



at Moderate Charges. 



ANY FORM OF GLASS APPARATUS REPAIRED. 



DEMONSTRATIONS given here, or at Colleges, 4c. 



HUFI Ml (if! IIATTOX 4;aki>en,lo\i>o\. 

 ■ n&^lTlj Telephone: 2M2 HuHjorD. 



ACTUAL MAKER of ALL KlXfis of X Ray, Geissler and other 

 Vacuum Tubes, Mercury Pumps, High Frequency Electrodes, lic. 



Lt-it /?f£. 



1VK.T.TIS 



Some La.rg:e Clear 



SELENITE CRYSTALS 



WITH FLUID INCLUSIONS 



now on view/ and sale at 



THOMAS D. RUSSELL'S 



Ground-Floor Show Rooms, 



11 JOHN STREET, BEDFORD ROW, LONDON, W.C. 



Ji^hn street (^Theobald's Road) is reached from 

 Holbo>'n I'v Gray's htn Road or M'arivick Court. 



Catalogues of Collections, Glass - Capped Boxes, Caf its. 

 Card Trays, and Hammers, Post Free, 



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