DRY AND 12 IMMERSION OBJECTIVE, (COMPLETE IN BOX) £5: 10:0 CHAS. COLLINS, Microscope Manufacturer, 157° GREAT PORTLAND STREET, W. (Corner of Weymouth Street.) Catalogues of Microscopes, Apparatus, Specimens, &c., per post on application, HENRY CROUCH, 51 London Wall, London, E. C. REVISED PRICE LIST OF OBJECTIVES. 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 best screw adjustment for thickness of cover, £4 10s. 4-in. 90 -in. 120 2-in. 15° 2-in. 12° 14-in. 20° £ s. d. £ s. d. 1 0 0 1-in. 100° -in. 140° 315 0 Post-Office Orders to be made payable at Lombard Street, with 6d. extra for postage. FUNGI: EDIBLE, POISONOUS, & MICROSCOPIC. The following Books and Charts will be useful:- How to Distinguish easily the Difference between Edible and Poisonous Fungi; with two large Sheets, containing Figures of 22 Edible and 31 Poisonous Species, drawn the natural size, and coloured from living specimens. By WORTHINGTON G. SMITH, F.L.S., &c. In sheets, with book, price 6s.; on canvas in cloth case, for pocket, 10s. 6d.; on canvas, with rollers and varnished, for hanging up, 10s. 6d. (A Plain and easy Account of). With especial reference to the Esculent and other Economic Species. By M. C. COOKE. New and revised Edition, with Coloured Plates of 40 Species. Fep. price 6s. A very readable volume upon the lowest and least generally understood race of plants. For popular purposes the book could not have been better done.'-Athenæum. Second edition, price 68. now ready. MICROSCOPIC FUNGI: A Plain and Easy Guide to the Study of Rust, Smut, Mildew, and Mould. By M. C. COOKE. Over 300 Coloured Figures. To all possessors of a microscope this prettily illustrated book is specially to be commended.'-Fuld. London: ROBERT HARDWICKE, 192 Piccadilly, W. RUPTURES (By Royal Letters Patent). WHITE'S MOC-MAIN LEVER TRUSS, Perfected and Exhibited in the Great Exhibitions, 1851 & 1862, IS Manufacturer, Mr. WHITE, 228 Piccadilly, London. Price of a Single Truss, 16s., 21s., 26s. 6d., and 31s. 6d.-Postage, 1s. Post-office Orders to be made payable to JOHN WHITE, Post Office, Piccadilly. ELASTIC STOCKINGS, KNEE-CAPS, &c. For VARICOSE VEINS, and all cases of WEAKNESS and SWELLING of the LEGS, SPRAINS, &c. They are porous, light in texture, and inexpensive, and are drawn on like an ordinary stocking. Price 4s. 6d., 78. 6d., 10s., and 16s. each.-Postage, 6d. Manufacturer, JOHN WHITE, 228 Piccadilly, London, W. SCHOOL OF CHEMISTRY. 20 Great Marlborough Street, Regent Street. FORMERLY DIRECTED BY ARTHUR VACHER, F.C.S. JUNIOR DEMONSTRATOR OF CHEMISTRY IN THE ROYAL SCHOOL OF MINES. The LABORATORIES are furnished with every requisite for the study of the Science. The Hours are from Ten to Five, except on Saturdays, when the Laboratory closes at One. The charge is £5 per Month, or £3 for Half-time. There are no extra expenses, Chemicals, Apparatus, &c., being provided. Students work independently of each other, and can enter at any time. 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 RICHARD A. PROCTOR, B.A., F.R.A.S., Author of 'Half-Hours with the Telescope.' Fep. 8vo. cloth, with Illustrations on Stone and Wood, price 2s. 6d. HALF-HOURS WITH THE TELESCOPE, 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. London: ROBERT HARDWICKE, 192 Piccadilly, W. TRANSACTIONS OF THE ROYAL MICROSCOPICAL SOCIETY, AND RECORD OF HISTOLOGICAL RESEARCH. Edited by HENRY LAWSON, M.D., M.R.C.P. EDIN., F.R.M.S., Is Assistant Physician to St. Mary's Hospital, and Lecturer on Histology in St. Mary's Hospital Medical School. devoted exclusively to the interests of Microscopical Science in the widest and most accurate sense of the term. It contains not only the Proceedings of the Royal Microscopical Society, but also embraces communications from the leading Histologists of Great Britain, the Continent, and America. Besides Original Contributions, The Monthly Microscopical Journal supplies its readers with a comprehensive résumé of the latest Foreign Inquiries, Reviews and Short Notices of the more important works on Histology and the Microscope, Bibliographical Lists of all the recent Microscopical Publications at Home and Abroad, and descriptions of all New and Improved Forms of Microscopes and Microscopic Apparatus; also Correspondence on all Matters of Histological Controversy, and, finally, The Monthly Microscopical Journal gives to the Proceedings of both Metropolitan and Provincial Societies a more prominent position than that which has hitherto been accorded to them; and not only does it contain Reports furnished by the Secretaries of the several Provincial Societies, but it contains also all those Papers of Local Associations which are of real scientific importance. Contributions requiring illustration are accompanied by most carefully drawn plain or coloured Plates, and the text is printed in clear and legible type, thus affording the Microscopist a readable Monthly Record of all that takes place in the branch of science specially interesting to him. Vol. I. of the above, with 392 pp. Letterpress, and 17 whole-page Plates, bound in cloth, price 10s. 6d., containing Articles by D. FORBES With Reports of Microscopical Societies and a Summary of Microscopical Science, from Jan. 1 to June 1, 1869. Vol. II. of the above, with 342 pp. Letterpress, and 19 whole-page Plates, bound in cloth, price 10s. 6d., containing Articles by With Reports of Microscopical Societies and a Summary of Microscopical Science from June 1 to Dec. 1,1869. Vol. III. of the above, with 334 pp. Letterpress, and 18 whole-page Plates, bound in cloth, With Reports of Microscopical Societies and a Summary of Microscopical Science from Jan. 1 to June 1, 1870. Vol. IV., cloth 10s. 6d. (341 pp. Letterpress, and 14 whole-page Plates), containing Articles by— With Reports of Microscopical Societies and a Summary of Microscopical Science, from June 1 to Dec. 1, 1870. Sixth Edition, ready January 2nd, 1871. Dedicated by express permission to His Royal Highness THE COUNTY FAMILIES OF THE UNITED KINGDOM; OR, ROYAL MANUAL of the TITLED and UNTITLED ARISTOCRACY. EDITED BY E. WALFORD, M.A. LATE SCHOLAR OF BALLIOL COLLEGE, OXFORD. The COUNTY FAMILIES gives a brief notice of the Descent, Birth, Marriage, Education, and Appointment of each person; his Heir (apparent or presumptive); the Patronage at his disposal; a Record of the Offices which he has held; together with his Town Address and Country Residences. All the information is compiled from materials collected from the Families themselves, and every exertion is used to render the Work thoroughly accurate and reliable. In One Splendid Volume, 11,000 Families, over 1,000 pages super-royal, beautifully bound, gilt edges, price £2 10s. London ROBERT HARDWICKE, 192 Piccadilly, W. NEARLY READY. THE SHILLING PEERAGE, 1871. THE SHILLING BARONETAGE, 1871. THE SHILLING KNIGHTAGE, 1871. THE SHILLING HOUSE OF COMMONS, 1871. Lo ONDON: ROBERT HARDWICKE, 192 Piccadilly, W. A GUIDE TO THE PHYSICAL DIAGNOSIS OF THE DISEASES OF THE LUNGS AND HEART; TOGETHER WITH AN INTRODUCTION TO THE EXAMINATION OF THE URINE. By JAMES SAWYER, M.B. LOND., &c., Resident Physician, Queen's Hospital, Birmingham. 'Observer, c'est diriger de concert les sens et l'intellect vers un objet, afin de le mieux conBitre.-GINTRAC, PATHOLOGIE. London: ROBERT HARDWICKE, 192 PICCADILLY, W. Now Ready, Price Two Shillings. SOME POINTS IN THE PHYSIOLOGICAL AND MEDICAL ASPECT OF SEWAGE IRRIGATION, Being the Second Edition of a Paper read at the Social Science Congress, at Bristol, October 2nd, 1869. With notes upon the recent evidence adduced against Irrigation in the Houses of Parliament, &c. TO WHICH IS ALSO APPENDED A PAPER ON THE INFLUENCE OF SEWER GAS ON THE PUBLIC HEALTH. By ALFRED CARPENTER, M.D. With large plan of the Irrigation Fields at Beddington, Surrey. London: ROBERT HARDWICKE, 192 PICCADILLY, W. |