SCIENCE-GOSSIP. 



IMCASONT'S 



MICROSC OPICAL SPE CIMENS. 



SERIES OF 9 DOUBLY STAINED BOTANICAL SECTIONS, 



6 INSECT DISSECTIONS or 18 MISCELLANEOUS, 1/1. 



Practical Hints on Mounting, (Copyright Pamphlet) 6d. 



Neu) List now ready, i stamp. 



B. G. IWASOW, 69 Park Rd., CLAPHAM, S.W. 



LIVING SPECIMENS FOR 

 THE MICROSCOPE. 



Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actino- 

 sphaerium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, 

 Melicerta, and many other Specimens of Pond Life. Price is. per 

 Tube. Post Free. Helix pomatia, Astacus, Amphioxus, Rana, 

 Anodon, &c., for Dissection purposes. 



%l 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, Sertular^ ; Actinia, Tealia, Caryophyllia, 

 Alcyonium ; Hormiphoria (preserved) ; Leptoplana ; Lineus, 

 Amphiporus ; Nereis Aphrodite, Arenicola, Lanice, Terebella ; 

 Lepas, Balanus, Gammarus, Ligia, Mysis, Nebalia, Carcinus ; 

 Patella, Euccinum, Eledone, Pecten ; Bugula, Crisia, Perdicellina ; 

 Holothuria, Asterias, Echinus ; Ascidia, Salpa (preserved), Scyllium, 

 Raia, etc., etc. For Prices and more detailed Lists apply to 



The Direetop, Biological Laborator y, Plymouth. 



MR. HENRY BARTLETT, 



77 Tasman Road, Clapham, London, S.W., 



Undertakes the setting of Lepidoptera, either fresh specimens or 

 dried in papers, in Continental or English style. Usual Terms. 

 Work promptly executed. Reference to Editor of Sclencc-Gosslp. 



ALFRED H. BASTIN, 



ENTOMOLOGIST, 

 Ivy House, 28 New Road, Reading. 



AU kinds of apparatus for the use of Entomologists kept in 

 stock. A large stock of Exotic Insects of all kinds. A special 

 40-page Descriptive List may be had free on application by intend- 

 ing purchasers. Special cases illustrating Warning Colours," 

 "Mimicry," "Protective Resemblance," &c., can be supplied at 

 very low rates. Correspondence invited. Second-hand cabinets 

 bought and sold. 



BUTTERFLIES. MOTHS. 



Best value given for Collections from all 

 parts of the world. 



Travellers' own Collections named, ar- 

 ranged, and mounted. 



Many fine species for sale. 



PERCY I. LATHY, 



Sydney Road, Enfield, England. 



BIRDS' EGGS, SKINS, SHELLS, 

 INSECTS, APPARATUS, 



and Requisites of all Kinds, sold, bought, and exchanged. 

 Fifty-page Price List on receipt of stamp. Established "zo years. 



CHARLES JEFFERYS, Naturalist, 



TETBUBY, Grloucestershire. 



BRITISH SPIDERS. 



I shall be pleased to help anyone working up local lists 

 of British Spiders by naming specimens FREE. Postage 

 for return of collections should be enclosed. 

 FRANK P. SMITH, 



IS Cloudesley Place, Islington, 

 London, N. 



Di^OO' PATENT - - 

 rivJOO NEW MODEL 



PRISM BINOCULAR GLASSES. 



" The Power and Field of a Telescope in the compass of an 

 Opera Glass." 



Combining — 



PERFECT MECHANICAL CONSTRUCTION, 



EXTREME PORTABILITY and RIGIDITY, 



HIGH POWER and SPLENDID DEFINITION. 



Focussing by Adjustment of 

 Eyepieces. 



Magnification. Price. 



8 diameters ... £8 



10 ,, ... 9 



12 „ ... 10 



With spiral focussing arrange- 

 ment and one adjustable eye- 

 piece, 10s, each extra. 



Send for COMPLETE 



CATALOGUE of 

 MICROSCOPES, 



TELESCOPES. 

 PHOTOGRAPBIC LENSES, 

 CAIMERAS and APPARATUS 

 LONDON MADE. OF ALL DESCRIPTIONS. 



Gold Medals and Highest Awards at all Great Exhi- 

 bitions. Awarded The Grand Prix, Paris, igoo. 



ROSS, Ltd., 



MANUFACTURING 

 OPTrCIANS, 



111 NEW BOND STREET, LONDON, W., and 



31 COCKSPUR STREET, CHARING CROSS, S.W. 



Paris : 35 BOULEVARD DU TEIVIPLE. 



AND OF ALL LEADING DEALERS. 



PHYSIOGRAPHY and GEOLOGY. 



Collections and Microscopic Slides to illustrate above, as advised 

 by Science and Art Directory, arranged by 



JAIVIS^S :R. GlXE^GGTRT^ & CO., 



Mloeralogrists, &c.. 



To Science and Art Department, British, Indian, and Colonial 



Museums, &c. 

 Mineral Specimens /or Mtiseams a?id Collectors^ arid all pur- 

 poses. Rock Specimens and Microscopic Sectiojis of Rocks and 



Minerals. Collections for Prospectors, S^c. 



Stores AND Offices:-! KELSO PLACE, KENSINGTON. W. 



Netu Catalogues and Lists Free. 



COLLECTIONS OF 



MINERALS, SHELLS, FOSSILS, &c. 



For SALE. Also DUPLICATES cheap. 



i.ppiy to F. IVi:. HSUS, 



Warwick Lodge, KNOWLE, near BRISTOL. 



TO GEOLOGISTS. 



1901. SEVENTH YEAR OF DISTRIBUTION. 1901. 



Typical Collections from famed Barton Beds 



{.upper Eocene). 

 Series i, 2, 3. Boxed, Named, and Localised. 30 Varieties. Over 

 100 Specimens in each Series. 3s. each on receipt of postal orders. 



Also Suites of PARIS BASIN MOLLUSCA 



{Eocene, Olig-ocene, and Miocene'). 

 Boxed, Named, and Localised. 40 Varieties, 6s. 6d. ; 100 Varie- 

 ties, 15s. ; by Parcel Post on receipt of Postal Orders. 

 R. CHARLES, Naturalist, 

 HIGHCLIFFE-ON-SEA, CHRISTCHURCH, HANTS. 



POPULAR ASTRONOMICAL LECTURES 



(WITH LANTERN ILLUSTRATIONS). 

 Mr. FRANK C. DENNETT (Departmental Editor] 

 for Astronomy of "Science-Gossip") is booking dates for thej 

 coming season. Terms, &c., on application. 



60 Lcnthall Road, Dalston, London, N«Ep 



