I WILL send twelve packets of micro material in exchange for a well-mounted slide.-G. A. Barker, 1 Northwold Road, Clapton, E. SCIENCE-GOSSIP, 1876-79, bound in cloth; 1880 in numbers; also 1881, Jan. to April, Nov., Dec.; 1882, Dec.; Coleman's "British Butterflies;" Wood's "Common Objects of the Country;" Wood's "British Moths;" Brown's "Astronomical Geology." All the above clean copies, though marked with a stamp; will exchange for micro apparatus or material, or for land and freshwater shells.-B. B. W., 23 Batoum Gardens, West Kensington Park, W. WANTED, a good turntable; also skull of bull frog, and skeleton of full-sized common frog.-K., The Manse, Bollington, near Macclesfield. WANTED, lantern photographic slides; will exchange six sculpture and twelve abbeys and cathedrals, six castles, and twelve others, send list; or will give microphotographs mounted on 3X1 polished slips for lantern slides.-R. Blakeborough, Guisborough. A DOUBLE nose-piece to fit Hartnack's microscopes, made specially by Collins, Great Portland Street, almost new; Hogg on the Microscope," 6th edition, as good as new. Wanted, last edition of Carpenter on "Beale on the Microscope in Medicine."-E. R. T., 24 St. Patrick's Hill, Cork. WANTED, a pair of healthy bullfinches in exchange for either vol. iii., iv., v., or vi. of " Boys' Own Paper," in monthly parts, with plates and index in perfect order, or vols. i. and ii. of Imison's "Elements of Science and Art," bound in tree calf.E. P. Turner, 6 Dagnall Park Terrace, Selhurst, S.E. MICRO slides: wing of Papilis Paris (green scales on rich brown ground) for other good slide. Please send box.A. Downes, Glenmore, Waverley Road, Bristol. DUPLICATES: Amathusio phidippus, Aganisthos orion, Callidryas philas, Megalura peleus, Papilio thoas. Desiderata: other exotic butterflies, or pupa of British lepidoptera.-Joseph Anderson, jun., Chichester, Sussex. FINE examples of Australian foraminifera, selected and named, including Discorbina, Valvulina, Clavalina, Patellina, Nubecu laria, and other rarities. Desiderata: Carpentaria, Tinoporus, Cymbalopora, Hanerina, Cassidulina, or any of the rarer species. Also rich foraminiferal material from the Tertiary beds of England and the continent.-W. Howchin, Goodwood East, Adelaide, South Australia. Parcels in bulk can be sent for enclosure, addressed as above, to the care of R. Fenwick, Sutton Street, Commercial Road East, London. WILL forward ant parasites in exchange for anything useful in microscopy.-H., i Madelaine Square, Liverpool. WANTED, a Rosszentmayer microscope stand. State exchange or price required to-S. C. L., 276 Middleton Road, Oldham. "ENGLISH MECHANIC," Nos. 758 to 796, the following numbers missing, 770, 776, 788, 790; exchange for fine cock and hen bullfinch, or for a piping cock only. A printing machine and type also wanted.-E. P. Turner, 6 Dagnall Park Terrace, Selhurst. WANTED, a hen ring-dove in exchange for a blue pigeon.Frederick Harding, Shipley House, 13 York Road, Eastbourne. WILL exchange one pair of blue pigeons for pair of dormice. -Frederick Harding, Shipley House, 13 York Road, East bourne. FIRST twenty-four parts of "Entomologists' Monthly Magazine," foreign shells, a horn of rhinoceros, minerals, and sucking fish (remora, for foreign curios, or shells or micro slides.F. M., 69 Duke Street, Old Trafford, Manchester. WANTED, gold and silver medals, and collections containing rare foreign postage stamps, in exchange for natural history specimens.-W. K. Mann, Wellington Terrace, Clifton, Bristol. WANTED, following nests, with clutches of eggs: dipper, ring ouzel, nightingale, stonechat, whinchat, grasshopper warbler, woodlark, cirl bunting, hawfinch, goldfinch, lesser redpole, &c. Offered, eggs, insects, shells, and various natural history specimens.-W. K. Mann, Wellington Terrace, Clifton, Bristol. WANTED, various eggs in quantities, and nests with clutches of eggs of uncommon species. Offered, British and exotic insects and shells.-W. K. Mann, Wellington Terrace, Clifton, Bristol. L. C., Nos. 40, 1039, 1127, 1128, 1330, for exchange. Send lists to-H. Purefoy FitzGerald, M.C.S., North Hall, Basing stoke. WANTED, the February and March, 1884, numbers of SCIENCEGOSSIP. State price or what wanted in exchange.-H. P. FitzGerald, M.C.S., North Hall, Basingstoke. OFFERED, six vols. of " Knowledge," complete, up to December, 1884, first four bound, and a collection of birds' eggs, in exchange for a good half-inch micro objective and slides.C. B. Keene, All Saints, Derby. WANTED, any articles of bric-à-brac, viz., coins, tokens, medals, seals, china, arms, armour, old Roman pottery, flint flakes, or stone or bronze weapons, in exchange for fossils, minerals, stuffed birds, &c.-F. Stanley, Margate. WANTED, axial crystals, quartz plates, &c., for table polariscope, in exchange for lantern and micro slides.-H. E. Freeman, 60 Plimsoll Road, Finsbury Park, N. BRITISH and Foreign birds' eggs offered for others not in collection.-Dr. J. T. T. Reed, Ryhope, Durham co. WILL exchange Goldsmith's "History of the Earth and Animated Nature," 4 vols., with plates, almost as good as new, for manuals of British botany or geology. What offers ?William Lyon, Broomhill Terrace, Keith. "NATURE," vol. xi.; the first two vols. " Magazine of Art;" also "Knowledge," two vols. of which are bound, Wanted, micro slides in exchange, apparatus, or offers.-H. Moulton, 37 Chancery Lane, London, W.C. SCIENCE-GOSSIP, complete for 1883 and 1884, unbound. Wanted, Tyndall "On Sound," Wallace's "Natural Selection," or Deschanel's "Physics," vols. i. and ii.-F. R. Tennant, Port Hill, Stoke-on-Trent. MICROSCOPE slides wanted in exchange for pair of photographs. General Gordon and Colonel Burnaby, coloured in oils on convex glasses, value 10s.-Mr. Ebbage, Watton, Norfolk. VOL. II. "Christian Million," and several "Rare Bits" and "Tit Bits," in exchange for natural history books or apparatus. -Frederick Harding, Shipley House, York Road, Eastbourne. SHILLING editions of Coleman's Butterflies," Wood's "Moths," Wood's "Beetles," and the three last numbers of SCIENCE-GOSSIP with plates, will exchange for natural history books or apparatus.-Frederick Harding, Shipley House, York Road, Eastbourne. A VERY fine and complete collection of fossils from the chalk of Surrey and Kent (specially rich in sharks' palate teeth, buth in variety and number) together with a collection of minerals and crystals (including a group of amethyst crystals 40 inches in circumference, and a slab of flexible sandstone) will be exchanged for English coins in fine preservation.-A.B., 97 Burton Road, Stockwell, S.W. "A LARGE number of shells in duplicate. Wanted, other shells, mounted molluscan palates, and back numbers of scientific journals.-S. C. Cockerell, 51 Woodstock Road, Bedford Park, Chiswick. DESIDEBATA: S. oblonga, P. roseum, Vertigos, Acme marine shells, and vars. of nemoralis, hortensis, &c. Duplicates: Testacella haliotidea, Z. glaber, A. acicula, L. glutinosa, P. pusillum, &c.—S. C. Cockerell, 51 Woodstock Road, Bedford Park, W. WANTED fossils, shells, or eggs, in exchange for chalk fossils, nummulites, Trigonia, Gibbosa, &c. Also beetles from Peru and Luscor; staghorn, Necrophorus vestigator, &c.—M. T. C., Wrasenham Vicarage, Swaffham, Norfolk. OFFERED for other species, either British or foreign: H. revelata, Pisana, arbustorum, aspersa v. tenuior, P. contecta, L. neritoides, V. verrucosa, H. tuberculata (Herm), M. aciculatus, Cl. Rolphii, H. ventrosa, &c.-B. Tomlin, 59 Liverpool Road, Chester. WANTED, SCIENCE-GOSSIP for 1884, complete with plates of microscopy, unbound. Offers, quite new: Among the Wild Flowers,' by Rev. H. Wood, or "Wild Flowers, where to find and how to know them," by Spencer Thomson, M.D., L.R.C.S., F.B.S.E., or pressed specimens of two rare centaureas; C. calcitrapa and C. solstitialis.-Miss E. A., Dadnor, Ross. BOOKS, ETC., RECEIVED. "The Worcester County Naturalist" (Mass.).—" Feuille des Jeunes Naturalistes."-" Canadian Science Monthly."."-"The American Monthly Microscopical Journal."-"The Naturalist." -"Journal of Conchology."-"Journal of the New York Microscopical Society."-"Science."-"Report of the Entomologist."-" Catalogue of the Exhibit of Economic Entomology." -"Proceedings of the Geologists' Association." — "Canadian Entomologist." "-" American Naturalist."—" The Microtomist's Vade-Mecum," by Arthur Bolles Lee (London: J. & A. Churchill).-" Transactions Herts. Nat. Hist. Soc.," vol. iii., parts 3 and 4.-"Report of S. London Entomolog, and Nat. Hist. Soc. for 1884."-"Proceedings of Acad. of Nat. Sciences of Philadelphia."- "Popular Science News."-Proceedings of the Holmesdale Natural History Club," 1881-1883. -"Handbook to the Geology of Shropshire," by J. D. La Touche (London: Ed. Stanford). "Revista Scientifica " (Porto). COMMUNICATIONS RECEIVED UP TO IITH ULT. FROM :C. A. G.-A. S. B.-F. R.-F. H. L.-W. T.-F. M.-F. F.R. B.-S. F.-J. E. K.-J. B. B.-W. S. S. & Co.-E. H.J. H. C. R.-E. W. O'M.-W.-E. R. T.-E. P. T.-J. E.E. B.-J. A.-E. F.-S. J. M'I.-W. P.-A. H. F.-A. A.W. H.-(H. A. K.)-G. A. B.-C. B.-H. B.-E. T. D.H. A. W.-F. S.-H. E. F.-B. B.-E. B. L. B.-H. A. F. H. P. F.-M. E. P.-S. C. L.-G. W. B.-J. A.-F. J. G.J. R. R.-E. P. T.-A. R. W.-E. A.-B. T.-A. B.-F. H. J. W. O.- Mr. E.-H. F.-F. M.-D. B.-J. T. T. R. W. W. B.-W. H. P.-A. A.-C. T. M.-E. Č.-M. L. S. F. R. T.-M. T. C.-G. E. E.-S. C. C.-H. M.-L. M. W. H. S. W.-J. R.-C. F. F.-H. W. K.-W. L.-C. B. K. A. M. P.-A. D.-W. K. M.-J. F.-H. L.-Dr. A. B. G.G. H.-O. P. C.-J. E.-A. D.-H. G. G.-G. E. T.M. W. N.-C. S.-W. H. H.-T. D. A. C.-H. H.-J. M. C.W. T.-T. S.-H. M.-C. M.-J. H.-B. B. W.-T. N. K.— &c., &c. HARDWICKE'S SCIENCE-GOSSIP. BROWNING'S xlv AMATEUR'S SET OF PHOTOGRAPHIC APPARATUS For Dry Plate Photography, comprising a superior Achromatic Lens, COMPLETE IN CASE, Price £2 5s. FULL ILLUSTRATED CATALOGUE OF PHOTOGRAPHIC APPARATUS SENT FREE. POPULAR SHILLING BOOKS. Sold also in cloth at Is. 6d. each. THE ART OF DRESS. By Mrs. H. R. and SURGICAL HINTS. By N. E. DAVIES, NURSERY HINTS: A Mother's Guide in HOW TO USE OUR EYES, and How to TION AND VOICE PRESERVATION: A THE HAIR: Its Treatment in Health, Weak- THE MAGIC LANTERN AND ITS LONDON CHATTO AND WINDUS, PICCADILLY, 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. LOUGHS The testimony of Medical Gentlemen has been unqualified in praise of Lamplough's TRAD maintain health, with perfect vigour of body and mind :-"Have it in your houses, and forget it not in your travels." 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. 4/6 COLLINS' POND COLLECTING STICK Consists of a neatly made Bamboo Stick, with joint to pull out to 5ft., and a Dipping Bottle and Weed Hook to 4/6 CHAS. COLLINS, OPTICIAN, 157, GREAT PORTLAND ST., LONDON, W. 36-PAGE CATALOGUE MAILED FREE ON APPLICATION. CHAS. COLLINS' HISTOLOGICAL MICROSCOPE, With 1 inch and inch Objectives of splendid definition, complete, in Mahogany Case, £5 10s. THIS Microscope is described and Illustrated in Dr. CARPENTER'S last Edition of "The Microscope and its Revelations," and the author states in the preface that "His principle has been to make mention only of such makers as have distinguished themselves by the introduction of any new pattern which he regards as deserving of special recommendation." From C. HORKIRK, Esq., F.L.S., Dewsbury, author of Synopsis of British Mosses:-"I have known this instrument since its first introduction, and have frequently used different examples of it, and all with equal pleasure. It is easy of manipulation, and the fine adjustment is one of the best I have ever used. To anyone who desires to have a really good useful instrument at a moderate price, I always recommend your Histological Microscope." 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, ENTOMOLOGY, HISTOLOGY, INFUSORIA, NATURAL HISTORY, GEOLOGY, &c., &c., &c. Back parts of the various Microscopical Journals, always in Stock. Catalogues on application. Scientific Books bought or exchanged. Agent for the American Monthly Microscopical Journal; The Microscope and the Journal of the New York Microscopical Society, each 5s. per annum, postage included. 157, GREAT PORTLAND STREET, OXFORD STREET, LONDON, W. CHAS. COLLINS, JUNR., MICRO-NATURALIST, BRISTOL HOUSE, HARLESDEN, N.W. Series No. 3, of COLLINS' "Special Micro-Slides," is Now Ready for Sale, and consists of the Six following carefully prepared 2. Head of Gnat (Male). The above Set of Six will be sent enclosed in a neat cloth racked box, post free for 5s. 6d. Single Slides, 1s. each, postage ad. extra. THE WANDERER'S LIBRARY. Crown 8vo., cloth extra, 3s. 6d. each. THE LIFE AND ADVENTURES OF THE WORLD BEHIND the SCENES. TAVERN ANECDOTES and SAYINGS: THE GENIAL SHOWMAN; Life and THE STORY of the LONDON PARKS. MAYHEW. Illustrated. SEVEN GENERATIONS OF EXECUTIONERS: Memoirs of the Sanson Family (1688 to 1847). Edited by HENRY SANSON. TUNIS: The Land and the People. By SUMMER CRUISING in the SOUTH the Chevalier DE HESSE-WARTEGG. With 22 Illustrations. SEAS. BY CHARLES WARREN STODDARD, Illus. trated by WALLIS MACKAY. LONDON: CHATTO AND WINDUS, PICCADILLY, W. Barbican Optical Works, 66, Barbican, London, E.C. NEW SLIDE. DESMIDIACEAE, PENIUM, MICRASTERIAS, &c. Mounted so as to retain the Color. A Beautiful Object, Is. 6d. free per post. CHAS. COLLINS, OPTICIAN, 157, GREAT PORTLAND STREET, LONDON, W. NEW BOOK BY THE EDITOR OF "SCIENCE-GOSSIP." OUR COMMON BRITISH FOSSILS, With over 300 AND WHERE TO FIND THEM. A Handbook for Students. By J. E. TAYLOR, Ph.D., F.G.S., &c., Author of "The Sagacity and Morality of Plants." Illustrations. Crown 8vo, cloth extra, 7s. 6d. CHATTO AND WINDUS, PICCADILLY, W. REMEDY FOR INDIGESTION. CAMOMILE PILLS Are confidently recommended as a simple but certain Remedy for Indigestion, which is the cause of nearly all the diseases to which we are subject, being a medicine so uniformly grateful and beneficial, that it is with justice called the "Natural Strengthener of the Human Stomach." "Norton's Pills" act as a powerful tonic and gentle aperient; are mild in their operation, safe under any circumstances, and thousands of persons can now bear testimony to the benefits to be derived from their use, as they have been a never-failing Family Friend for upwards of 50 years. Sold in Bottles at Is. Id., 2s. 9d., and 11s. each, in every Town in the Kingdom. CAUTION. Be sure to ask for "NORTON'S PILLS" and do not be persuaded to purchase an imitation. 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, BRONCHITIS, AND ALL DISEASES OF THE PULMONARY CONSUMPTION, GOUT, SCROFULA, 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. 1 d. 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. 1d., 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 |