Nos. 1 to 201 may still be had, price 8d. 81. No. 252.-Dec., 1885. S-S PROCTER'S INDIAN HAND-PRINTED CURTAINS. Excellent Artistic Effect and Inexpensive. Fifteen Shillings per Pair. CARVED FURNITURE AND INDIAN JEWELRYV ) СОСОA. GRATEFUL EPPS'S ( FIRST-CLASS SPECIMENS, New and Rare Objects in every Department of Microscopy. LORD S. G. OSBORNE'S DIATOMESCOPE, Post-free, 12s. Five Typical Examples of Blood Discs on one Slide, Man, Fish, Bird, Snake, and Frog, Double Stained, 3s. 6d. post-free. Pistil of Mirabilis Jalapæ. For Para- ERNEST HINTON, Volvox globator. For Paraboloid, boloid, 1s. 2d. post-free. 1s. 2d. post-free. 12, VORLEY ROAD, UPPER HOLLOWAY, LONDON, N. CABINETS FOR MINERALS, FOSSILS, &c. 6 DRAWERS, 20 INCHES HIGH .. 21s. 10 39 8 DRAWERS, 26 INCHES HIGH 288. 52s. 45s. Naturalists' Glass-Capped Boxes, Round and Rectangular, from One Shilling per Dozen. THOMAS D. RUSSELL, 78. NEWGATE STREET, E.C. SECOND-HAND MICROSCOPES AND OBJECTIVES. A large assortment by ROSS, BECK, COLLINS, SWIFT, and other first-class Makers, on Sale, very cheap. MICROSCOPÍC OBJECTS in great variety. Spécialité Physiological and Pathological Tissues. 500 SECOND-HAND PHOTOGRAPHIC LENSES AND CAMERAS By ROSS, DALLMEYER, TENCH, VOIGTLÄNDER, and all other esteemed Makers. The Cheapest and Best Stock in London. New Catalogues gratis on application. Purchases and Exchanges made. Instruments Repaired and Relacquered. SANDS & HUNTER, 20, CRANBOURNE STREET, LONDON. PUPA OF THISTLE-BUG, NEW PREPARATIONS (MONANTHIA Cardui.) This is a most interesting preparation of the pupa, when about to change to the perfect insect, the form and markings of which can be distinctly seen. For Paraboloid. IS. 7d., Post-free. OF INSECTS, WITHOUT PRESSURE. FRED. ENOCK, 21, PROSPERO ROAD, UPPER HOLLOWAY, LONDON, N. THE OAK-APPLE FLY, (ANDRICUS TERMINALIS.) Hymenopterous Insect, showing the arrangement and structure of the internal Muscles. A most beautiful preparation for Polariscope, or Paraboloid. 25. Post-free. “ Very convenient and portable, gives ample Illumination, has all necessary adjustments, is provided with a Cylindrical Case, and can be conveniently carried in the breast coat pocket; when charged with sufficient Oil to burn for above 3 hours, weighs under 12 oz. Price 8s. 6d. Microscopists who are in the habit of exhibiting at the Meetings of their respective Societies and elsewhere, should provide themselves with this little Lamp. MICRO-PETROLOGY, TYPICAL ROCK SECTIONS, 1/6 AND 2/- EACH. JAMES HOW & Co., 73, FARRINGDON STREET, LONDON. STUDIES IN MICROSCOPICAL SCIENCE. Edited by ARTHUR C. COLE, F.R.M.S., &c. VOL. III. Numbers 1 to 10 in each Section now ready. All correspondence connected with this Volume to be addressed to J. G. HAMMOND & Co., 136 Edmund Street, Birmingham, from whom Prospectus can be obtained. Now ready, VOL. I., containing 53 Chromo-Lithographed Plates, £1 11s. 6d. ; or, accompanied by 52 Prepara. tions, in Cabinet, £4 14s. 6d. And VOL. II., containing THE METHODS OF MICROSCOPICAL RESEARCH; SECTION I., ANIMAL HISTOLOGY; SECTION II, BOTANICAL HISTOLOGY: and POPULAR MICROSCOPICAL STUDIES; with 38 CHROMOLITHOGRAPHED PLATES, LI 11s. 6d. ; or, accompanied by 36 Preparations, in Cabinet, £445. od. NOTE.-The Sections of either Volume may be had separately. All correspondence having reference to Vols. I. and II. to be addressed to the EditorST. DOMINGO HOUSE, 171, Ladbroke Grove Road, Notting Hill, W. From whom all Particulars may be obtained. *.* A. C. COLE AND SON'S Pathological, Physiological, Botanical, and general Preparations and Diatoms, may be obtained of all the principal Opticians. MICROSCOPY.-MICRO-NATURAL HISTORY (ZOOLOGICAL AND BOTANICAL) AND THE ALLIED SCIENCES. Just Published, and will be sent Post Free for Two Stamps, W. P. COLLINS's New Catalogue of Books (mostly Secondhand) Scientific Libraries Purchased and Books taken in Exchange. W. P. COLLINS, Science Bookseller, 157, Great Portland Street, London, W. HARDWICKE'S SCIENCE-GOSSIP. cvii WATKINS AND DONCASTER, Naturalists and Manufacturers of Entomological Apparatus and Cabinets. N.B.-For Excellence and Superiority of Cabinets and Apparatus, references are permitted to distinguished Patrons and Colleges, &c. Entomological Pins, assorted or mixed, 1/- per oz. (white or [oz. Mite Destroyer (not inflammable nor dangerous to use), 1/- per Ditto, Book Pattern, 8/6, 9/6, and 10/6. Setting Boards, flat or oval, 1-in., -/6; 1-in. -/8; t-in., -/9 Breeding Cage, 2/6, 4/-, 5-, and 7/6. Taxidermist's Companion, ie, a pocket leather case, containing Ditto, Japanned Pocket Case, fitted with 26 tubes, 5/ for post.) (Supplied to Insect Cases, imitation mahogany, 3/6 to 11/-. Metal Blow-pipes, -/7. Setting Needles, 6d. per box. All Articles enumerated are kept in stock, and can be sent immediately on receipt of order. For Sale, a large Assortment of Ova and Pupa of both British and Foreign Butterflies and Moths. CABINETS. Special Show Room. The following are the prices of a few of smaller sizes; for measurements and larger sizes see Catalogue (48 pp.) Minerals and Dried Plants, Fossils, &c. 23/ .... A LARGE STOCK OF INSECTS AND BIRDS' EGGS. Birds, Mammals, &c., Preserved and Mounted by First-class workmen. 36, STRAND, W.C. (FIVE DOORS FROM CHARING CROSS). FIVE GUINEAS IN PRIZES. THE 2d.] NATURALIST'S WORLD. [2d. A Monthly Illustrated Magazine of Natural History. £1 1s. for best Essay on life of ROBERT DICK. £1 1s. for best collection of 100 Short Sayings from well-known Natural History Writers. £1 1s. for best account of a NATURAL HISTORY RAMBLE. £1 1s. for best photograph of BRITISH SCENERY. £1 1s. for best collection of 12 SPRING FLOWERS. Specimen copy of The Naturalist's World, with full particulars of competitions, post-free 21d. from PERCY LUND & CO., Ilkley, Yorks. LONDON: W. SWAN SONNENSCHEIN & CO., and of all Booksellers. MICRO-SLIDES FOR SCIENCE CLASSES. The Series as above, complete FIFTEEN SHILLINGS. Mr. PIFFARD'S Patent Counter-sunk Slips. Sizes now ready. 3-16 and 5-8. SIX SHILLINGS per Dozen. Hempsted, Herts. СОСOATINA. Anti-Dyspeptic Cocoa or Chocolate Powder. GUARANTEED PURE SOLUBLE COCOA OF THE FINEST QUALITY. The FACULTY pronounce it 'the most nutritious, perfectly digestible Beverage for BREAKFAST, LUNCHEON, or SUPPER, and invaluable for Being without sugar, spice, or other admixture, it suits all palates, keeps for years in all climates, and is four times the strength of Cocoas thickened yet weakened with arrowroot, starch, &c., and in reality cheaper than such mixtures. Invalids, and Young Children.' 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Incorporated in the year 1847 under Act 7 and 8 Vict., cap. 110, and further empowered by Special Act 15 Vict., cap. 53. Accumulated Fund £1,028,215 Surplus Funds already appropriated £997,000 Annual Income, nearly £200,000 Claims Paid £1,280,133 £4,793,942 Policies in Force POLICIES ABSOLUTELY INDISPUTABLE after five years, provided the age of the Assured has been admitted. CHRISTMAS EDWIN BOWLEY, Secretary. PRESENTS!! Just Published, 16-PAGE CATALOGUE of COLLINS' MICRO-SPECIALITIES. NEW, RARE, & INTERESTING OBJECTS FOR THE MICROSCOPE. Radiate plates from Myriotrochus Rinkii, grouped, very rare.. W. WATSON & SONS would call special attention to their Exhibi- CLASSIFIED LIST OF OBJECTS, including the late Mr. E. Wheeler's Stock of over 40,000 First-class Specimens. ILLUSTRATED CATALOGUE OF MICROSCOPES. W. WATSON & SONS, Opticians to Her Majesty's Government, 313, HIGH HOLBORN LONDON W.C... Established 1837. 14,797 GRAPHIC MICROSCOPY. By E. T. DRAPER. No. XXIV.-EGGS OF PARASITE OF VULTURE. OMMONLY surrounded with uninviting associations of decay and pollution, the Apterous, or wingless insects, have to the uninitiated a reputation of repulsiveness and inherent ugliness; but without comparing them for beauty with creatures of a higher class, they are found under microscopic examination to possess an interest essentially their own. Possibly no other order shows, from the egg to perfection, a greater diversity of form, or more quaint embellishment. The division Anoplura, commonly known as lice, are parasitic on mammals and birds. The plate represents the eggs of the species infesting the feathers of the vulture. The number of varieties is very extensive, and the egg necessarily greatly diversified in configuration. Many are beautifully sculptured, and provided with contrivances in the shape of covers and lids. Almost every bird has a distinct variety, some two or three, and different forms of egg may be found in distinct and separate localities, in the breast and neck, and on the under side of the primary wing feathers. Birds in captivity in shape and adornment, well exemplified in a beautiful specimen of a wood mite of the genus Oribata, procured from Mr. C. Collins, jun., of Harlesden. It presents an extraordinary appearance; the development is, egg, larva, nymph, and the adult male and female. The nymph changes, or partly moults its skin, four or five times, carrying the cast skins on its back overlapping each other, and being necessarily of various sizes they give the appearance of its being surrounded with a series of flounces. The creature in this condition seems tricked out with a general assortment of frippery and furbelows. The reader is referred to Mr. Michael's papers, and beautiful plates on this interesting species in late numbers of the "Journal of the Microscopical Society." Those who have not access to the writings of Nicolet, Claparède, C. L. Koch, and others, on the Acarina, can procure a cheap handbook, "Economic Entomology; Aptera," by Mr. Andrew Murray, published by Chapman and Hall, by order of the Committee of Council on Education. It is lavishly illustrated with typical forms, well indexed, and forms a valuable key of reference to more exhaustive research. Crouch End. TEETH OF FLIES. By W. H. HARRIS. No. VIII. "FUCELLA FUCORUM," Fallen. HIS fly was taken on debris cast up by the tide I suffer severely, but scarcely any of the feathered on our coast during the latter part of October, tribe escape. Specimens of the rarest beauty may be obtained from the pheasant. Of the Acarina, or mites, a wide and interesting field is open to the young microscopist. Found wherever there is decay and mouldiness, even in the cavities of the bones of skeletons, they may be regarded as ubiquitous. Many are extremely curious No. 252.-DECEMBER 1885. but may, very probably, be taken in other situations if diligently searched for. There is nothing very peculiar in its general appearance to attract attention, and it is therefore rather difficult to describe satisfactorily, so that it may be recognised by the collector. It is a rather small fly, being not more than about a X |