STUDENT'S monocular microscope, by Johnson, optician to University College, with mechanical stage, coarse and fine adjustments, sub-stage diaphragm, two eye-pieces A and D, 1 in. and in. object classes, polariscope and selenite stage, condensor, live cage, stage forceps and tweezers.-M. I., 4 Lower Terrace, Hampstead, N.W. WANTED, one of Shadbolt's turntables, or an equally good one; will exchange a genuine Mulready envelope, stamped, post-marked, and undeniably an original one.-F. Cresswell Du Bois, 15 West Cromwell Road, Kensington. FINE micro photographs in exchange for good slides, &c. Microscopic objects photographed. -F. Guardia, Helston House, Rozel Road, Clapham, S.W. WANTED, SCIENCE-GOSSIP from beginning of 1865 to end of 1884, either bound or in loose numbers; and also any other microscopical books or journals. State what is wanted in exchange for them.-Charles Von Eiff, jun., 347 Greenwich Street, New York City. WANTED, pennies, halfpennies, and farthings of Edward I., Edward II., and Edward III. Flint flakes in exchange.B Piffard, Hill House, Hemel Hempstead, Herts. WILL send tube of living budding Hydra viridis on receipt of a good mounted object.-Thomas W. Lockwood, Lobley Street, Heckmondwike, Yorkshire. WANTED, fresh specimens in fruit of the Musci, Hypnum Atrichmum Grimmia, Pottia orthotrichum, also Marchantia polymorpha and Riccia glauca. Well-mounted micro slides of interest offered in exchange.-R. A. Hawkins, The Cottage, Quarry Road, Hastings. MICRO slides: will send in exchange for four good mounts the following:-fertile pinnule of hare's-foot fern (Davillia), ditto royal fern (Osmunda), tr. sect., ivy, ditto jessamine, both double-stained.-J. B. Bessell, Fremantle Square, Bristol. WANTED, No. 11, vol. iii., of "Natural History Notes," published Nov. 1883, edited by F. J. Rowbotham. Offered in exchange, cretaceous fossils, land and freshwater shells, Lepidoptera.-A. Beales, 37 Kingsley Road, Maidstone. WILL exchange SCIENCE-GOSSIP for 1884, the March number missing, for natural history specimens, especially stuffed birds or mammals.-George H. Brocklehurst, B.Sc., Roundhay, Leeds. Cypræa lyna and Cypræa helvola from Zanzibar, and Nassa reticulata from Scotland; exchange for other shells not in collection. Mrs. S., 21 London Road, Brentford, Middlesex. OFFERED, Bourne's "Catechism of the Steam Engine" and "Handbook of the Steam Engine," Phillips' "Mineralogy," also "Knowledge," vol. i. unbound. Wanted, books on aquarium, especially Taylor's "Aquarium," or works by Gosse, or back volumes of SCIENCE-GOSSIP, &c.-G. A. Simmons, 102 Ladbroke Grove Road, London, W. WANTED, skins and eggs of British birds in exchange for land and freshwater shells. Duplicates: P. vivipara, B. Leachii, P. hypnorum, L. lævis, T. haliotidea, Z. nitidus, 2. glaber, P. pusillum, &c. Desiderata: S. ovale, U. margaritifer, Z. purus, H. fusca, B. perversa, &c.-F. G. Fenn, 20 Woodstock Road, Bedford Park, W. WANTED, local varieties of British shells; also mounted molluscan palates, and back numbers of scientific journals, especially the " Journal of Conchology." Shells in exchange, including Paludina contecta, P. vivipara, Zonites glaber, and Helix lamellata.-S. C. Cockerell, 51 Woodstock Road, Bedford Park, Chiswick, W. WANTED, books by Hogg, Clarke, Martin, and others on the microscope; also Clark's Seaweeds," and vol. vi. of the "Boys' Own Paper;" good exchange given in micro slides.W. S. Anderson, 7 Granby Street, Ilkeston. WANTED, SCIENCE-GOSSIP for 1879 and 1883, also any volumes earlier than 1876. Will give good micro slides in exchange.-Samuel M. Malcolmson, M.D., 55 Great Victoria Street, Belfast. "Anti OFFERED, Gosse's "British Sea Anemones," Lyell's quity of Man," Pratt's "Wild Flowers" (large 4to.), "Testimony of the Rocks," and other good books. Wanted, French works on marine algæ.-T. H. Buftham, Connaught Road, Walthamstow. WHAT offers in exchange for some large fossil fern slabs from coal pit, Heath, near Bristol? Tropical recent land shells preferred.-Miss F. M. Hele, Fairlight, Elmgrove Road, Cotham, Bristol. A 4-inch reflecting telescope in exchange for good microscopic objective or offers of scientific apparatus.-E. B. Fennessy, Pallas Green, Limerick. LIVING specimens of Hydra viridis, now budding in tube, in exchange for mounting material, insects preserved in spirit wanted, such as-Saw flies, horse flies, wood ant, fairy fly, or parasites of animals, or fish, &c., or else large spines of foreign Sea Urchin, for making sections.-W. H. Pratt, 15 Gill Street, Nottingham. WANTED, British and foreign land and fresh-water shells, particularly some Testacella maugei in exchange for 24 yards of very fine aviary wire-netting, a yard wide and inch mesh, unused; also some of first numbers of "Knowledge" and "Amateur Work," Pirates of Penzance vocal score, and various other books, &c.-Wilfred Mark Webb, 31 Aynhoe Road, West Kensington Park, W. SPONGE spicules: will send a well-mounted slide of spicules of the Cliona spouge (parasite on oyster shell), in exchange for any good slide, botanical or biological.-G. Swainson, 110 Park Road, Bolton. WANTED, a or immersion objective. Will give in part exchange Cassell's "Popular" and "Technical Educator, quite new, well-bound in scarlet calf, or handsome musical box (ten tunes).-G. S., 110 Park Road, Bolton. GOOD shells, fossils, and works on osteology, &c., offered in exchange for odd parts of Lovell Reeve's "Conchologia Iconica" and of the Paleontological Society."—Miss Linter, Arragon Close, Twickenham. BOTANICAL cabinet, 36 in. high, 18 in. wide, with a few specimens, for turntable and slides.-C. H. Goodman, 9 Dorlcote Road, Wandsworth Common. WANTED, good book on mechanics. Offered, SCIENCEGOSSIP, 1880, eighteen numbers of "Youth," forty numbers of "Boys' Newspaper," three numbers of "European Ferns."Archibald W. Fry, Bridge House, Arundel. MICRO slides for exchange. Wanted, books (science) or other slides. Lists free on application.-A. P. Wire, Seaton Villas, Birkbeck Road, Leytonstone. A FEW slides of Antheridia and Pistillid'a of mosses and hepatics, also ripe capsules of same, for other good mounts. Lists to-W. E. Green, 32 Belvoir Road, Bristol. FRESH gathered crowfoot clustercups (cidium ranunculacearum) and dock clustercups ((Ecidium rubellum), in exchange for nettle fungus ((Ecidium Urtica).-T. S. Morten, 3 Rosslyn Terraace, Hampstead, London, N.W. WANTED Geikie's lectures at South Kensington on Geology, Dand's Geology, Mineralogy, or books on coins, for "Boy's Own Papers." -John Millar, Clarence House, Inverkeithing, Fifeshire. OFFERED for exchange one hundred eggs with data of chough, sparrow-hawk, dipper, stonechat, grey wagtail, goldfinch, hooded crow, swift, ringed plover, redshank, heron, mute swan, puffin, guillemot, razor-bill, cormorant, gannet, herring-gull, kittiwake, storm-petrel and many others. Send list of duplicates and of desiderata.-Richard J. Ursher, Cappagh, Lismore, Ireland. WANTED, fossil sharks' teeth from any formation, not more than three of any species, must be named and localised, in exchange for fossils from chalk, gault limestone, oolites, London clay, &c.-George E. East, jun., 10 Basinghall Street, London OFFERED, pair of tumbler pigeons in exchange for three or four well-mounted micro slides.-R. H. T., 28 Albert Road, Devonport. BOOKS, ETC., RECEIVED. "The Microscope in Botany," Dr. J. W. Behrens (transl.) (Boston: S. E. Cassino & Co.) "Celestial Motions, a handy book of astronomy," W. T. Lynn, B.A. (Stanford).-" Birds I have kept," W. T. Greene, M.A. (L. Upcott Gill)-"Protoplasmic Continuity in the Fucaceae," Thomas Hick, B. A., B.Sc. "Contributions to the Fossil Flora of Halifax," Thomas Hick and William Cash.-"A Correlation Theory of Colour Perception," Charles A. Oliver, M.D.-"Geology of the Comstock Lode," and Atlas (U. S. Geol. Survey).—“ Ú. S. Geol. Survey, 3rd Report," 1881-2.-" Annual Reports of the Public Gardens and Plantations," Jamaica.-"Proceedings of the Academy of Natural Sciences of Philadelphia."-" The Lias Marlstone of Leicestershire as a source of Iron," by E. Wilson, F.G.S."Special Creation and Evolution," C. C. W. Naden.-" The Gold-fields of Victoria, Reports of the Mining Registrars.""Report of the Kelvingrove Museum, &c.," Glasgow, for 1884. "American Naturalist."-"Science."-" American Monthly Microscopical Journal."-"The Naturalist."-"Ben Brierley's Journal."-"The Journal of Conchology."-"Feuille des Jeunes Naturalistes."-" Popular Science News."—"Canadian Science Monthly."-"The Medico-Legal Journal," New York. "Illustrated Science Monthly."-" Papers and Proceedings of the Royal Society of Tasmania," 1884.-"East of Scotland Union of Naturalists' Societies Reports," 1884. COMMUNICATIONS ReceiveD FROM:-W. G.-C. C.-H. T. -P. S.-J. M.-H. C.-A. B.-H. W.-J. C. S.-G. H. B.M. S.-W. H. P.-G. A. S.-F. W. L. F. G. F. C. F. W. F. W.-A. V.-S. C. C.-W. S. A.-S. M. M.T. H. B.-S. C.-F. M. H.-J. P.-E. B. F.-T. W.A. D. W.-J. E. L.-C. D.-S. J. H.-G. E. E.-F. R. C.C. H. G.-A. W. F.-W. E. C.-J. B. W.-J. W.-A. P. W. -M. E. T.-W. E. G.-T. S. M.-W. 0.-W. G. W.M. J. H.-E.-C. N.-C. P. P.-J. G.-W. D. S.-J.-G. R. -D. W. B. jun.-F. W. E.-G. B.-W. H. P.-W. G.W. S. A.-T. W. L.-C. W.-D. B.-B. T. & C.-A. A.T. F.-C. S.-A. C.-G. F. H.-R. C.-R. A. N.-L.-E. D. -T. S.-A. B.-V. A. L.-T. W. D.-J. C. P.-F. R. C.M. E. T.-A. E. T.-C. J. B.-W. W.-C. v. F. jr.-F. J.B. P.-C. C.-A. S. M.-A. H. S.-T. F.-F. C. D. Ě.— H. W.-J. W. W.-H.-G. R.-C. F. W. F. W.-G. H. B.C. R.-H. W. K.-S. C. C.-J. F.-C. F. F.-R. L. HE. S. P.-R. J. U.-R. H. T.—A. K.-C. P.-W. M. W.&c., &c. HARDWICKE'S SCIENCE-GOSSIP. lxi GRACE'S NEW DIRECT VISION SPECTROSCOPE. John Browning 63Strand LONDON Mr. JOHN BROWNING begs to direct attention to the advantages of this very powerful, portable, and efficient Instrument, which will divide the Sodium lines or the D lines in the Solar Spectrum, and show the Rain-Band as Separate Lines; it is provided with a fine motion focussing arrangement, and it is applicable to every purpose for which a Direct Vision Spectroscope can be used. Price in Morocco Leather Case, £3 8s. 6d. JOHN BROWNING, Optical and Physical Instrument Maker to H.M. Government, Works by Professor RUSKIN. Published by and to be had of GEORGE ALLEN, Sunnyside, Orpington, Kent. LISTS SENT POST - FREE ON APPLICATION. 6/6 Now ready. Crown 8vo., cloth extra, 7s. 6d. The Chemistry of Cookery. By W. MATTIEU WILLIAMS, F.R.A.S. London: CHATTO AND WINDUS, Piccadilly. COLLINS' POND COLLECTING STICK Consists of a neatly made Bamboo Stick, with joint to pull out to 5ft., and a Dipping Bottle and Net to attach 6/6 MICROSCOPES AND APPARATUS. 36-PAGE CATALOGUE MAILED FREE. 5/10/0 COLLINS' HISTOLOGICAL MICROSCOPE, With 1-inch and 4-inch Objectives of splendid definition, in Mahogany Case. Harley Binocular Microscopes, Dissecting Microscopes, Cabinets, Objects, Lamps, Object Glasses, Thin Glass, Ground Slips, Pocket Magnifiers, Mounting Media, &c. CHAS. COLLINS, MICROSCOPE MAKER, 157, Great Portland Street, London, W. W. P. COLLINS, Science Bookseller, Speciality-Microscopy and the Allied Sciences. New and Second-hand Works on ALGE, BIOLOGY BOTANY, CHEMISTRY, CORALS, CONCHOLOGY, DESMIDS, DIATOMS, 157, GREAT PORTLAND STREET, OXFORD STREET, LONDON, W. LAMPLOUGH'S EFFERVESCING PYRETIC SALINE. It gives instant relief in HEADACHE, INDIGESTION, LASSITUDE, CONSTIPATION, SEA or BILIOUS SICKNESS, and quickly cures the worst form of TYPHUS, SCARLET, JUNGLE, and other FEVERS, PRICKLY HEAT, SMALL-POX, MEASLES, ERUPTIVE or SKIN COMPLAINTS, and various other altered conditions of the Blood. The testimony of Medical Gentlemen has been unqualified in praise of Lamplough's Dr. TURLEY.-"I have found it act as a specific in my experience and family in the worst form of SEE OTHER TESTIMONIALS IN ADVERTISEMENTS IN TIMES, &c., AND WITH EACH BOTTLE. H. LAMPLOUGH, Chemist, 113, Holborn. LOUCHS ་ H TRADE MARK CHANGE OF ADDRESS WM. TYLAR, 178, NEWTOWN ROW, BIRMINGHAM, FFERS THE FOLLOWING SPECIAL LOTS per doz. Anatomical preparations, in best style, 75. per doz. Rock Sections, ros. per doz. Entomological and Miscellaneous, 75. per doz. All on approval for Selection. 3 X 1 Smooth Slips, 45. per gross. Thin Circles, 2s. 9d. per oz. Other materials equally cheap. Lists one Stamp. Stones Cut, Sliced, or Polished for Cabinet or Microscope, about half usual charges. The TENBY and SOUTH WALES NATURAL HISTORY DEPÔT, WARREN STREET, TENBY, SOUTH WALES. The Cheapest House in the Kingdom for British Shells, Crustaceans, etc. Specimens sent on Approval. Lists (free) on application. THE Annual Subscription to "SCIENCE GOSSIP" is FIVE SHILLINGS-the Numbers being sent monthly, post-free. Post-office Orders should be made payable to the Publishers, CHATTO & WINDUS, 214, Piccadilly, London, W.-Orders for Advertisements should be sent to the same address, not later than the 18th of the month preceding that in which they are intended to appear. ESTABLISHED 1851. BIRKBECK BANK.— Southampton Buildings, Chancery Lane. THREE PER CENT. INTEREST allowed on DEPOSITS, repayable on demand. TWO PER CENT. INTEREST on CURRENT ACCOUNTS calculated on the minimum monthly balances, when not drawn below £50. The Bank undertakes for its Customers, free of Charge, the Custody of Deeds, Writings, and other Securities and Valuables; the collection of Bills of Exchange, Dividends, and Coupons; and the purchase and sale of Stocks, Shares, and Annuities. Letters of Credit and Circular Notes issued. THE BIRKBECK ALMANACK, with full particulars, post free, on application. FRANCIS RAVENSCROFT, Manager. The Birkbeck Building Society's Annual Receipts exceed Five Millions. HOW OW TO PURCHASE A HOUSE FOR TWO GUINEAS PER MONTH, with immediate Possession and no Rent to pay. Apply at the Office of the BIRKBECK BUILDING SOCIETY, 29, Southampton Buildings, Chancery Lane. OW TO PURCHASE A PLOT OF LAND A SYNOPSIS OF THE BACTERIA AND YEAST H FOR FIVE SHILLINGS PER MONTH, with immediate possession, either for Building or Gardening purposes. Apply at the Office of the BIRKBECK FREEHOLD LAND SOCIETY, as above. The BIRKBECK ALMANACK, with full particulars, on application. FRANCIS RAVENSCROFT, Manager. FRAMPTON'S tive remedy for Indigestion, WILLIAM OF PILL Bilious and Liver Complaints. For FEMALES these Pills are truly excellent, removing Headache, Depression of Spirits, Dulness of Sight, Nervous Affections, Blotches, Pimples, Sallowness of the Skin, and give a healthy bloom to the com HEALTH. plexion. All Chemists at Is. Itd. and 25. 9d. per box. ет Doth Gilloth WILLIAM WOOLLAMS & CO., TRADE MANUFACTURING W PAPER STAINERS. Are the Original Makers of ARTISTIC WALL 110, HIGH STREET, LONDON, W. Gold Medal, International Health Exhibition Barbican Optical Works, 66, Barbican, London, E.C. CHATTO & WINDUS, PUBLISHERS. Author of "The Childhood of the World," &c. Crown 8vo, cloth extra, 5s. MARINO FALIERO: a Tragedy. By ALGER- MYTHS AND DREAMS. By EDWARD CLODD, NON CHARLES SWINBURNE. Crown 8vo, cloth extra, 6s. UNCLE JACK. By WALTER BESANT, Author of "All Sorts and Conditions of Men," &c. Crown 8vo, cloth extra, 6s. THE POETS' BEASTS. By PHIL ROBINSON, SOCIETY IN LONDON. By a Foreign Resident. MILITARY MANNERS AND CUSTOMS. VIA CORNWALL TO EGYPT. By C. F. STUDIES RE-STUDIED: Historical Sketches ACADEMY NOTES, 1885. With Facsimile IS. GROSVENOR NOTES, 1885. With Facsimile CHATTO & WINDUS, PICCADILLY, W. With Facsimile A CLEAR COMPLEXION GODFREY'S EXTRACT OF ELDER FLOWERS has long been known for its surprising effect in softening, improving, and preserving the Skin, and in rendering the Complexion clear and beautiful. It removes Tan, Sunburn, Redness, &c.; cures Pimples, Humours, and other Eruptions; and by persevering in its use the Skin becomes delicately soft, clear, and smooth. GODFREY'S EXTRACT OF ELDER FLOWERS Possesses a delightful fragrance, and is an indispensable adjunct to the Toilet and Nursery. DR. ROOKE'S ORIENTAL PILLS & SOLAR ELIXIR. THESE WELL-KNOWN FAMILY MEDICINES have had a continually increasing sale throughout the United Kingdom and the British Colonies since their introduction in 1836, and are especially noted for their STRENGTHENING and RESTORATIVE Properties; hence their invariable success in the RELIEF and CURE of INDIGESTION, LIVER COMPLAINTS, ASTHMA, PULMONARY CONSUMPTION, GOUT, SCROFULA, AND ALL DISEASES OF THE NERVOUS SYSTEM, Whether arising from a sedentary mode of life, unhealthy occupation, insalubrious climate, or any other cause. The ORIENTAL PILLS AND SOLAR ELIXIR Are prepared only by CHARLES ROOKE, M.D., SCARBOROUGH. The PILLS are sold in boxes, at is. 1d. and 4s. 6d. each; the ELIXIR in Bottles at 4s. 6d. and 11s. each, duty included. Around each Box and Bottle are wrapped Directions for the Guidance of Patients in all Diseases. DR. ROOKE'S HANDY POCKET-GUIDE TO HEALTH AND HEALTH-RESTORING PLACES. FULL OF PLEASING ILLUSTRATIONS AND USEFUL INFORMATION, 88 PAGES. This Book may be obtained from any PATENT MEDICINE VENDOR, or POST FREE from DR. ROOKE, Scarborough, England, on receipt of PENNY POSTAGE STAMP. CROSBY'S BALSAMIC COUGH ELIXIR Is the leading Medicine of the day, and is specially recommended by several eminent Physicians. It has been used with the most signal success for Asthma, Bronchitis, Consumption, Coughs, Influenza, Consumptive Night Sweats, Spitting of Blood, Shortness of Breath, &c., and is a most valuable adjunct to Dr. ROOKE'S Medicines in all affections of the Throat and Chest. CROSBY'S BALSAMIC COUGH ELIXIR is sold everywhere, by all Chemists and Patent Medicine Vendors at the following prices :-1s. 14d., 1s. 9d., 4s. 6d., and 11s. each Bottle. A great saving is effected by purchasing the large Bottles. Full Directions with each Bottle. LONDON: PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, STAMFORD STREET AND CHARING CROSS |