MICROSCOPIC OBJECTS. Classified Catalogue, 1871, Post-free. FIRST CLASS SPECIMENS, New and Rare Objects in every Department of Microscopy. MOLLER'S DIATOMACEEN TYPEN PLATTES. NOBERT'S BANDS OF LINES. MICROSCOPES, FIRST-CLASS ACHROMATIC OBJECTIVES, AND ALL MATERIALS FOR MOUNTING. By THOMAS DAVIES. This Manual comprises all the most approved methods of Mounting, together with the result of the Author's experience and that of many of his friends in every department of Microscopic manipulation. LONDON: ROBERT HARDWICKE, 192, PICCADILLY, W. Third Edition, much enlarged, with full description of the various parts of the Instrument, price 2s. 6d. plain ; 4s. coloured. HALF-HOURS WITH WITH THE MICROSCOPE. By EDWIN LANKESTER, M.D. Illustrated by 250 Drawings from Nature by Tuffen West. Half an hour on Structure. Half an hour in the Garden. CONTENTS. Half an hour in the Country. Half an hour at the Pond-side. Half an hour at the Seaside. Appendix.-The Preparation and Mounting of Objects. "The beautiful little volume before us cannot be otherwise than welcome. It is, in fact, a very complete manual for the amateur microscopist The Half-Hours' are filled with clear and agreeable descriptions, whilst eight plates, executed with the most beautiful minuteness and sharpness, exhibit no less than 250 objects with the utmost attainable distinctness."-Critic. ..... LONDON: ROBERT HARDWICKE, 192, PICCADILLY, W. J. SWIFT, MICROSCOPE MAKER AND PRACTICAL OPTICIAN. FOUR GOLD MEDALS AWARDED For Superior Quality of Objectives, and Improvements of Microscopes and Accessories. SWIFT'S NEW IMMERSION-IN. OBJECTIVE giving Brilliant Definition under deep Eye-piece Power, with great distance from object when in focus. This Objective is not surpassed by any Continental or English makers. Fully Illustrated Catalogue of Microscopes, &c., for Stamp, containing new revised list of Objectives, 43, UNIVERSITY STREET, TOTTENHAM COURT ROAD, LONDON, W.C. New Edition, Now Ready, Price 6s. A PLAIN AND EASY GUIDE TO THE STUDY OF MICROSCOPIC FUNGI, By M. C. COOKE. With Plates of over 300 Figures, coloured by hand. "No one with a microscope of common power need want rational amusement, if he will but hunt for microscopic objects such as those which Mr. Cooke has introduced to notice..... A great deal of instruction will be found under each head on a variety of subjects most interesting to the cultivator and others, and Mr. Cooke has not failed to apply to the latest sources of information... The volume is so reasonable as regards price, that there is no excuse for not referring to the original, which we recommend to the notice of all horticulturists who wish to know something of a very large and troublesome class of diseases."-Gardeners' Chroniele. . "To all the possessors of a microscope, this small and prettily illustrated book is specially to be commended. . . . As an introduction to the study of the different genera of minute fungi it is well adapted, as it is profusely illustrated with coloured figures, and written in a very pleasing, intelligible style. The objects described and delineated offer to microscopic observers an illimitable field for interesting observation."-Field. "There is a thoroughness about Mr. Cooke's writings which, to our minds, always makes his communications to the public welcome. ... Mr. Cooke is not content to gather information from cyclopædias or other standard works, classify and adapt the same, and then give a new form to the thoughts of others. On the contrary, he strikes out a new study, and, after a laborious course of analysis, produces an entirely original work; one on which nothing of the kind had before been attempted. The interesting volume before us is greatly enriched by nearly three hundred coloured examples of fungi, by Mr. Sowerby."-Wesleyan Times. LONDON: ROBERT HARDWICKE. 192. PICCADILLY. SECOND-HAND MICROSCOPES By Smith and Beck, Ross, Pillischer, and others. PHOTOGRAPHIC CAMERAS and LENSES, ASTRONOMICAL, TOURISTS', SLING, and SEASIDE TELESCOPES. Magic & Dissolving-View LANTERNS & SLIDES. RACE, FIELD, and OPERA GLASSES. SURGICAL, MATHEMATICAL, AND SURVEYING INSTRUMENTS. AT WILLIAM LAWLEY'S, 78, FARRINGDON STREET, CITY. Enlarged and revised Catalogues of nearly 100 pages for Three Stamps each. HARDWICKE'S SCIENCE-GOSSIP. HENRY CROUCH. 51, London Wall, London, E.C. REVISED PRICE-LIST OF OBJECTIVES. li THE OBJECTIVES comprised in the following Lists are guaranteed of the highest class, and especial attention is directed to the new IMMERSION -in., unsurpassed for brilliance and definition, and working through the thickest covering glass. The new IMMERSION, -in. 140°, with screw adjustment for thickness of cover, £4. 10s.; with extra dry front, £5. 10s. L. s. d. 0 0 0 4 10 0 PART XX., for DECEMBER, 1871, price 3s. 6d., contains: THE HIGH NUMBERS OF THE PENTATEUCH ARE THEY TRUSTWORTHY? By Philip Henry ISRAEL IN EGYPT: THE PERIOD OF THEIR SOJOURN AND THEIR NUMBERS AT THE 54, CORNHILL, E.C., LONDON. ROYAL BOTANIC SOCIETY OF LONDON. MEETINGS AT THE GARDENS, REGENT'S PARK, 1872. EXHIBITIONS OF SPRING FLOWERS.-Wednesdays, May 8th. SUMMER EXHIBITIONS.-Wednesdays and Thursdays, May 22nd, 23rd; June 19th, 20th; July 10th, 11th. On all Exhibition Days the Gates open at Two o'clock. AMERICAN PLANTS.-Daily, May 27th to June 15th, at 9 o'clock. MUSICAL PROMENADES.-Every Wednesday in May, June, and July, excepting the Exhibition days, commencing May 15th. LECTURES.-Fridays at 4 o'clock. May 17th, 24th, 31st; June 7th, 14th, 21st, 28th; July 5th. ANNIVERSARY MEETING.-August 10th, at 1 o'clock. Now ready, imperial quarto, price £1. 11s. 6d., With 61 Woodcuts and 12 whole-page Plates, containing 99 figures coloured to nature, A Monograph of the Gymnoblastic or Tubularian Hydroids. BY GEORGE JAMES ALLMAN, M.D., DUBLIN AND OXON., This Work contains the result of many years' study, and is intended to work out as exhaustively as possible the general Natural History of the HYDROIDA. A very large proportion of the observations are entirely original, and nothing has been taken for granted which it was possible to subject to personal verification by constant and widelyextended explorations of the coast, both within the tidal zone and in the deeper sea regions, followed up by laborious microscopic investigations. The plates are all drawn by the Author himself from the living animal. The soft parts, which constitute the chief interest in these wonderful organisms, are represented as they show themselves while the animal is still beneath the waters of its native seas. The plates, moreover, contain numerous anatomical and embryological details, and besides the magnified drawings of each species, in every case a figure of the animal in its natural size. LONDON: ROBERT HARDWICKE, 192, PICCADILLY, W. THE MONTHLY MICROSCOPICAL JOURNAL, No. XLII., for MAY, 1872, price 1s. 6d., contains : RESEARCHES ON THE FIRST STAGES OF THE DE- ON THE CLASSIFICATION AND ARRANGEMENT OF ON BICHROMATIC VISION. By J. W. Stephenson, F.R.A.S., THE SUPPOSED FUNGUS ON COLEUS LEAVES; AND With Reviews of Books and Summary of Microscopical Progress at Home and Abroad. Now ready, in Cloth, price 10s. 6d., Vol. VI. of the above, 388 pp., and 19 whole-page plates; also Vols. I., II., III., IV. and V. may be had in Cloth, price 10s. 6d. each. LONDON: ROBERT HARDWICKE, 192, PICCADILLY, W. THE POPULAR SCIENCE REVIEW, THE ECLIPSE OF LAST DECEMBER. By R. A. Proctor. ON THE STRUCTURE OF CAMERATED SHELLS. THE LITHOFRACTEUR. By S. J. Mackie. Complete Sets in Numbers, £5. 7s. 6d.; or 10 vols. in Cloth, £6. 38.; half-morocco, £7. 13s. By H. By Dr. HARDWICKE'S SCIENCE-GOSSIP. LABORATORY, 60, GOWER STREET, BEDFORD SQUARE, W.C. lili MR. HENRY MATTHEWS, F.C.S., is prepared to give Instruction in all Branches of PRACTICAL CHEMISTRY, particularly in its application to MEDICINE, AGRICULTURE, and COMMERCE. The Laboratory is open daily, except Saturday, from Ten to Five o'clock; on Saturday, from Ten to One o'clock. Mr. Matthews is also prepared to undertake ANALYSES of every description. apply to Mr. Henry Matthews, at the Laboratory, 60, Gower Street, Bedford Square, W.C. Colman's For Particulars and Prospectuses Flour unequalled for Blanc-Mange, Custards, Puddings, Cakes, Soups, &c. Fcap. 8vo., price 2s. 6d. plain, 48. coloured. HALF-HOURS WITH THE MICROSCOPE. By EDWIN LANKESTER, M.D. Illustrated by 250 Drawings from Nature by TUFFEN WEST. New Edition, much enlarged, with full Description of the various Parts of the Instrument. Fcap. 8vo., cloth, with Illustrations on Stone and Wood, price 2s. 6d. Being a Popular Guide to the Use of the Telescope as a means of Amusement and Instruction. Adapted to inexpensive Instruments. By R. A. PROCTOR, B.A., F.R.A.S. Demy 4to., cloth, price 58. HALF-HOURS WITH THE STARS. A PLAIN AND EASY GUIDE TO THE KNOWLEDGE OF THE CONSTELLATIONS. Showing in Twelve Maps the Position of the principal Star-Groups night after night throughout the Year. With Introduction, and a separate Explanation of each Map. True for every Year. By R. A. PROCTOR, B.A., F.R.A.S., Author of "Half-Hours with the Telescope." LONDON: ROBERT HARDWICKE, 192, PICCADILLY, W. DR. LANKESTER ON FOOD, AND ON THE USES OF ANIMALS, in Relation to the Industry of Man. Course of Lectures delivered at the South Kensington Museum. By E. LANKESTER, M.D., F.R.S., F.L.S. Crown 8vo., cloth, pp. 750 "Full of sound science, curious anecdotes, and quaint illustration. Dr. Lankester has a singular power of illustrative keenness; and in the discursive lessons which he delivers on so many subjects, there is an overflowing wealth of minute collateral information which is always brought to the level of the last achievements of science.' "-Lancet. LONDON ROBERT HARDWICKE, 192, PICCADILLY, W. THOMAS ROSS, OPTICIAN To H.M. the Queen; H.R.H. the Prince of Wales; H.R.H. the Princess of Wales; H.R.H. the Duke of Edinburgh; the Royal Navy; the Royal Yacht Squadron; the Prussian, Italian, and Egyptian Governments, &c. &c., 7, LATE WIGMORE STREET, CAVENDISH SQUARE, (Manufactory, 2, FEATHERSTONE BUILDINGS, HIGH HOLBORN.) MICROSCOPES, TELESCOPES, PHOTOGRAPHIC LENSES AND APPARATUS, SPECTACLES, &c. &c. STEPHENSON'S NEW ERECTING BINOCULAR ARRANGEMENT. CATALOGUES MAY BE HAD ON APPLICATION. . NOTICE. JOHN that he has taken the Premises, No, 63, STRAND, opposite Bedford-street. These Premises he opened as a West-end branch of his business on the 18th of March. In a Show-room, on the ground-floor, there will be every convenience for testing, or seeing in action, Microscopes, Spectroscopes, Astronomical, Electrical, and other Philosophical Apparatus. There are light workshops on the Premises. Communication has been established by electric telegraph with the Factory, at 111, Minories. JOHN BROWNING, Optical & Philosophical Instrument Maker to the Royal Society, the Royal Observatories of Greenwich and Edinburgh, &c., 63, Strand, W.C., 111, Minories, E., and 6, Vine Street, E.C. Specialities: Spectroscopes, Astronomical Telescopes, Polariscopes, Microscopes, and Electrical Apparatus. NEW MICROSCOPE APPARATUS. LIGHT CORRECTOR. This piece of apparatus is made as shown in the diagram, and consists of a brass plate to lay the object on, and beneath it a wheel which can be turned freely so as to bring the different glasses underneath the specimen. No. 1 is an open space; No. 2 a dark blue glass; No. 3 a light blue, and No. 4 a ground glass. By these a beautiful softness and purity of light can be obtained giving great comfort to the eyes and clearness of definition, entirely obviating the unpleasant yellowness of artificial illumination. Price 78. 6d. Superior Finish, 98. 6d. CHARLES COLLINS, 157, Great Portland Street, London, W. Catalogues on application. HOW'S MICROSCOPE LAMP, 10s. 6d. Description on receipt of One Stamp. MAGIC LANTERNS, DISSOLVING VIEW APPARATUS, &c. JAMES HOW, 2, Foster-lane, London, DOLLOND & CO., BY APPOINTMENT, OPTICIANS TO (ESTABLISHED 1750.) HER MAJESTY, To the Hon. Corporation of the Trinity House. To the Royal National Life-Boat Institution. No. 1, LUDGATE HILL, CORNER OF ST. PAUL'S CHURCHYARD. BINOCULAR GLASSES, BAROMETERS, THERMOMETERS, SEXTANTS, &c. DOLLOND'S UNRIVALLED ONE-GUINEA OPERA GLASS, of great power and clear definition. Dollond's Binocular 2-Guinea Field Glass (the Gem), of great power. DOLLOND & CO.'S Celebrated GOLD, SILVER, STEEL, and TORTOISESHELL SPECTACLES. N.B.-All goods forwarded carriage free to any part of the United Kingdom. PRICE LISTS ON APPLICATION. |