Barbican Optical Works, 66, Barbican, London, E.C. CHAS. COLLINS, JUNR., MICRO-NATURALIST, BRISTOL HOUSE, HARLESDEN, N.W. PREPARER OF MICROSCOPICAL SPECIALITIES, MOUNTED WITH OR WITHOUT PRESSURE. The above set is enclosed in a Neat Cloth Racked Box, and each Slide contains a descriptive From CHARLES COLLINS'S intimate acquaintance with all branches of the Microscopical Trade, he respectfully solicits Microscopists to furnish him with particulars of their requirements in Microscopical Apparatus (new or secondhand), having facilities for procuring and. supplying them on most advantageous terms. All Orders 1or Mounting Materials, Cements, Glass Slips, Thin Glass Circles, Cells (Tin or Glass), etc., executed with promptness. CLEAR COMPLEXION. GODFREY'S EXTRACT OF 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, 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. 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. 1 d., 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 A Handbook for Students. By J. E. TAYLOR, Ph.D., F.L.S., &c., Author of The Sagacity and Morality of Plants.' LONDON: CHATTO AND WINDUS, PICCADILLY. With over 300 Illustrations. Cr. Svo, cloth extra, 75. 6d. 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.. of Echini. ERNEST HINTON, post-free. 12, VORLEY ROAD, UPPER HOLLOWAY, LONDON, N. CITY MICROSCOPICAL STUDIO AND GEOLOGICAL MUSEUM, THOMAS D. RUSSELL, 78, NEWGATE STREET, E.C., CLOSE TO THE NEW GENERAL POST OFFICE. WORKS BY EDWARD WALFORD, M. A.-Dedicated by Express Permission to H.R.H. THE PRINCE OF WALES. (New Editions for 1885.) THE SHILLING BARONETAGE. THE SHILLING KNIGHTAGE. THE SHILLING HOUSE OF COMMONS. LONDON: CHATTO AND WINDUS, PICCADILLY, W. 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 Londen. New Catalogues gratis on application. Purchases and Exchanges made. Instruments Repaired and Relacquered. SANDS & HUNTER, 20, CRANBOURNE STREET, LONDON. VERTICAL SECTION THROUGH ABDOMEN OF QUEEN BEE, APIS MELLIFICA. Showing Ovaries and all Internal Organs. 25. and 35., Post-free. Opaque for Binocular. NEW PREPARATIONS WITHOUT PRESSURE. FRED. ENOCK, WOKING. “ FIRST LEG OF HONEY APIS MELLIFICA. Is. 8d., Post-free. For Paraboloid. HOW AND CO.'S NEW "POCKET MICROSCOPE LAMP." 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. will be commenced shortly. All correspondence connected with this Volume to be addressed to All correspondence having reference to Vols. I. and II. to be addressed to the Editor- *** A. C. COLE AND SON'S Pathological, Physiological, Botanical, and general Preparations and Diatoms, may be obtained of all the principal Opticians. HARDWICKE'S SCIENCE-GOSSIP. lix 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; 14-in. -/8; 14-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 o 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). CHAS. COLLINS, JUNR., MICRO-NATURALIST, BRISTOL HOUSE, HARLESDEN, N.W. (Within five minutes' walk of Willesden Junction.) PREPARER OF MICROSCOPICAL SPECIALITIES, MOUNTED WITH OR WITHOUT PRESSURE. LIST OF SERIES ALREADY ISSUED: Series No. 3 Series No. 1.-12 Slides of Fish Scales (Opaque), 10s. 6d. Series No. IA.-9 Slides of Fish Scales (Polariscope), 3 Skins (Opaque), 10s. 6d. Series No. 2.-12 Slides of Heads of Insects (mounted without pressure), 10s. 6d. 6 Slides of Parts of Insects (mounted without pressure), 5s. 6d. Series 4.-12 Slides of Parasites, 12s. 6d. Full detailed list of the above Series, post-free on application. MICRO-SLIDES Mr. PIFFARD'S PATENT COUNTER-SUNK SLIPS now on Sale. Prasiola Crispa, portion of Thallus, beautiful arrangement of Chlorophyl granules, 1s. Teleutospores of Puccinia graminis, 1s. Spores and Elaters of Aneura Pinguis (Jungermanniaceae) 1s. Stained and Isolated Conidia-bearing Hyphe, of a Micro-fungus, probably Polyactis cana, 1s. Lecanora Tartarea, vert. sect. of Apothecium, showing Asci, 1s. Atrichum Undulatum, vert. sect., Male Perichætum and Antheridia, 1s. Fasciated Stems of Strawberry, Sweet Pea, Tropaeolum and Thistle, 1s. each. B. REMITTANCE WITH ORDER. ENLARGED CATALOGUE READY, POST FREE. PIFFARD, Hill House, Hemel Hempstead, Herts. SCHWEITZER'S COCOATINA. Anti-Dyspeptic Cocoa or Chocolate Powder. GUARANTEED PURE SOLUBLE COCOA OF THE FINEST QUALITY. Invalids, and Young Children.' The FACULTY pronounce it 'the most nutritious, perfectly digestible Beverage for BREAKFAST, LUNCHEON, or SUPPER, and invaluable for |