SCIENCE- GOSSIP. 



FOR SALE OR EXCHANGE. 



TEMPERES 



DIATOMEES DU MONDE ENTEER. 



Collection of 625 Slides, each described in printed 



Catalogue. Cost £25. 



F. W. Mills, Thornle'igh, Huddersfield. 



MASON'S 



MICROSCOPICAL SPECIMENS. 



SERIES OF 9 DOUBLY STAINED BOTANICAL SECTIONS, 

 6 INSECT DISSECTIONS op 18 MISCELLANEOUS, 1/1. 



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

 New List now ready, 1 stamp. 



R. G. MASON, 69 Park Rd., CLAP HAM. 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. 



THOMAS BOLTON, 



25 BALS'ALL 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, 

 Alcyonium ; Hormiphoria (preserved) ; Leptoplana ; Lineus, 

 Amphiporus ; Nereis Aphrodite, Arenicola, Lanice, Terebella ; 

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

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

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

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



The Director, Biological Laboratory, Plymouth. 



CHARLES A. SNAZELLE, 



NATURALIST, 



And Dealer in Microscopic Sundries, Lantern Slides, &e. 



A Large Number of Botanical and Zoological Micro Preparations, 

 by J. Hornell, of Jersey, in Stock. 



TO TEACHERS, STUDENTS, AND OTHERS. 



Type Collections offered as below, correctly named and 



localised. 



MOLLUSCA (Land, i'reshwater, and Marine). 



[NOTICE.— Not confined to British Species only.] 



100 Species in 4-drawer Deal Cabinet .. .. .. .. 25/- 



150 ,, 6 „ „ ,, 40/- 



250 „ 10 ,, „ „ ... .. 70/- 



(Small Specimens in Glass-topped Boxes.) 



LEPIDOPTEEA (British, .and Exotic). 



100 Specimens — (well selected) .. .. .. .. .. 20/- 



200 ,, ,, ,, .... .. 60/- 



Cabinets or Book Pattern Store Boxes extra. 



fJOLEOPTERA (British). 



100 Species— (neatly carded) in Store Box . . . . 7/6 & 10/6 



250 „ „ ,, ,, .. .... 30/- 



5°o „ ,>.,»... •• •• 70/- 



Larger Collections offered at Special Terms. 



Price Lists on Application. 



4 TOLLINGTON PARK, LONDON, N. 



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 



SETTING INSECTS. 



MR. HENRY BARTLETT, 



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

 Undertakes the setting of Lepidoptera, either fresh specimens or 

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

 Wink promptly executed. Reference to Editor of Science-Gossip. 



Medals and Highest Awards at all - - 



Great International Exhibitions. 



ROSS, Ltd., 



Manufacturers of Celebrated 

 Photographic Lenses, 

 Field and Studio Cameras. 

 New Hand Cameras, 

 Science & Enlarging Lanterns, 

 Microscopes and Objectives, 

 Sporting & Naval Telescopes, 

 Field, Marine & Opera Glasses, 

 &c. &c. 



P 



HOTOQRAPHIC 



for f\\ JTPIT^ 



every purpose. V/ *^ * * * 1 ±2 



The most useful CAMERAS 



FITTED WITH UNEQUALLED 



ROSS, ZEISS or GOERZ 



LENSES. 



Every Requisite for Photography. 



Illustrated 

 PRICE LISTS 

 Post Free. 



ROSS, Ltd., 



Manufacturing: 

 Opticians, 



in New Bond Street, London, W., and 

 31 Cockspur Street, Charing Cross. 



PHYSIOGRAPHY and GEOLOGY. 



COLLECTIONS and MICROSCOPIC SLIDES as advised by 

 Science and Art Directory, arranged by 



JUTVUBS R. ORE GORY Sc CO., 



Mineralogists, &c. , to Science and Art Department, British, 

 Indian, and Colonial Museums, &c. 

 Collections made to illustrate all Works oft Mineralogy, Petrology, 

 <5?*c.,. also for Prospectors and Mining Engineers. Minerals 



supplied for all purposes, either in Specimens or by Weight. 



Stores and Offices :— 1 KELSO PLACE, KENSINGTON, W. 



New Catalogues and Lists Free. 



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, Oligocene, 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. 



ALFRED H. BASTIN, 



ENTOMOLOGIST, 

 Ivy House, 28 New Road, Reading. 



All 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 fr e on application by intend- 

 ing purchasers. Special cases illustrating Warn ng Colour," 

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

 very low rates. Correspondence invited. Second-hand cabinets 

 bought and sold. 



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, 

 15 Cloudesley Place, Islington, London, N. 



