JOHN NOW READY. WHELDON'S CATALOGUE OF BOTANICAL WORKS AND PAPERS, PART I. Including FUNGOLOGY, from the Library of the late Rev. M. J. Berkeley. LONDON: 58, GREAT QUEEN ST., LINCOLN'S INN FIELDS, W.C. MICRO-SECTIONS OF ROCKS. New Sections of Special Interest, 1s. 6d. each. Catalogue of First-Class Microscopical Preparations in all Departments of Nature, post-free on application to THOMAS D. RUSSELL, Geologist and Mineralogist, 78, NEWGATE STREET, LONDON, E.C. THE BRITISH BRITISH MOSS By R. BRAITHWAITE, M.D. PART X., TORTULACE, price 10s. Subscriptions to Sect. 4 (10s. 6d.) may be sent to the Author. VOL. I., price £2 108., is published by LOVELL REEVE & CO., 5, HENRIETTA STREET, COVENT GARDEN. COUNCIL MEDAL, FIRST CLASS MEDAL, PARIS, 1867. PHILADELPHIA, GOLD MEDAL, INTERNATIONAL EXHIBITION, 1885. R. & J. BECK'S MICROSCOPES. APPLY FOR NEW CATALOGUE, Free on application to R. & J. BECK, 68, Cornhill, London, E.C. Post Free for Four Stamps. BOTANICAL AND ZOOLOGICAL WORKS, From the Libraries of the Late Prof. C. Babington, John Leigh, Esq., and Dr. John Percy, F.R.S., Being a CATALOGUE of NEW PURCHASES now on Sale by WILLIAM WESLEY & SON, 28, ESSEX ST., STRAND. SWIFT & SON'S New 1/12 in. Homogeneous Immersion Objective of 1.25 N.A., in which the New Abbe-Schott glass is used, price £5 5s. This lens, SWIFT & SON guarantee to be equal to any other Homogeneous Immersion Objective of the same N.A. SWIFT & SON are continually receiving testimonials in praise of the above Objective. A New 1/12 in. Apochromatic Homogeneous Immersion Objective of 1.4 N.A., £16. Compensating Eye-pieces, magnifying 10, 20, and 30 times, price each, £2. These Eye-pieces also give excellent results with Objectives made with the old Media. Projection Eye-pieces for Photo-Micrography, magnifying 3 and 6 times, each £2. For particulars of Professor Crookshank's Bacteriological Microscope, and Medical Press Comments, send for Circular. UNIVERSITY OPTICAL WORKS, 81, TOTTENHAM COURT ROAD, LONDON, W. COMPLETION OF HUDSON AND GOSSE'S ROTIFERA. The Rotifera; or 'Wheel-Animalcules.' By C. T. HUDSON, LL.D., and P. H. GOSSE, F.R.S. With 30 Coloured and 4 Uncoloured Plates. In 6 Parts. 4to. 10s. 6d. each; Supplement, 12s. 6d. Complete in 2 vols. With Supplement, 4to, £4 4s. *.* The Plates in the Supplement contain figures of almost all the Foreign Species, as well as of the British Species, that have been discovered since the original publication of Vols. I. and II. NATURAL HISTORY AGENCY, 158, BROMPTON ROAD, LONDON, Supplies MICRO.-GLASS, of the best English make only, as under:SLIPS, per gross-Crown, ordinary, 3" x 1", 3/6; do., thin, 5/-; Patent Plate, ordinary, 4/6, or with cavities, 11/-; do., extra white, 776; do., ordinary, 3" x 11", 6/-; do., 3" x 1", 7/-; do., 34" x 2", per dozen, 2/6. COVER GLASSES, No. 2 thickness, per oz. :-Circles," to "diam., 5/6; from "diam. upwards, 4/6; Squares. " to ", 4/6; from " upwards, 3/9; Rectangular, 1"x", 1"x", 1" x 1", 18" X 18", 2" ", 3/9. In the employment of the above no waste is to be apprehended from defect in material, colour, or workmanship. The new micro. watch-glasses for biological use always in stock. ROCK SECTIONS from carefully selected and localized examples, of large size and specially prepared for petrographical work by the most experienced hands, 2/- each. Inspection invited. Hand specimens can usually be provided with the sections. Rocks and minerals cut and polished on the premises. Rack-boxes. ADVERTISEMENTS FOR THE JOURNAL. MR. JOHN WM. GREEN, 20, HANOVER SQUARE, W., Is the sole authorized Agent and Collector for Advertising Accounts on behalf of the Society. FOR SALE. A BECK'S LARGE BEST BINOCULAR MICROSCOPE, Sorby's Spectroscope Eye-piece and many other pieces of apparatus added. Also, a and a Object-Glass, by POWELL and LEALAND. PRICE £40. I. F., 141, Evering Road, STOKE NEWINGTON, N. POWELL AND LEALAND, 170, EUSTON ROAD, LONDON, N.W. MANUFACTURERS OF MICROSCOPE STANDS, OBJECT-GLASSES, CONDENSERS, &c. Correction Collar to either of the above, £1 10s. extra. NEW SERIES OF APOCHROMATIC OBJECTIVES. Fellows intending to exhibit any Instruments, Objects, &c., or to bring forward any Communication at the Ordinary Meetings, will much facilitate the arrangement of the business thereat if they will inform the Secretaries of their intention two clear days at least before the Meeting. Authors of Papers printed in the Transactions are entitled to 20 copies of their communications gratis. Extra copies can be had at the price of 108. 6d. per half-sheet of 8 pages, or less, including cover, for a minimum number of 50 copies, and 68. per 100 plates, if plain. Propayment by P.O.O. is requested. ( 15 ), PARIS UNIVERSAL EXHIBITION, 1889. THE GRAND PRIX AND A GOLD MEDAL HAVE BEEN AWARDED TO ROSS & CO., MANUFACTURING OPTICIANS, 112, NEW BOND STREET (FACTORY, BROOK STREET), LONDON, W. Council Medal and Highest Award, Great Exhibition, London, 1851. Gold Medal, Paris Exposition, 1867. Medal and Highest Award, Exhibition, London, 1862. Medal and Diploma, Centennial Exhibition, Philadelphia, 1876. Medal and Diploma, Antwerp, 1878. Gold Medal and Diploma, Paris Exposition, 1878. Gold Medal, the Highest Award, Inventions Exhibition, 1885. THE ROYAL MICROSCOPICAL SOCIETY. (Established in 1839. Incorporated by Royal Charter in 1866.) The Society was established for the promotion of Microscopical and Biological Science by the communication, discussion, and publication of observations and discoveries relating to (1) Improvements in the construction and mode of application of the Microscope, or (2) Biological or other subjects of Microscopical Research. It consists of Ordinary, Honorary, and Ex-officio Fellows, without distinction of sex. Ordinary Fellows are elected on a Certificate of Recommendation signed by three Ordinary Fellows, setting forth the names, residence, and description of the Candidate, of whom the first proposer must have personal knowledge. The Certificate is read at two General Meetings, and the Candidate balloted for at the second Meeting. The Admission Fee is 27. 28., and the Annual Subscription 21. 28. payable on election and subsequently in advance on 1st January annually, but future payments may be compounded for at any time for 31. 108. Fellows elected at a meeting subsequent to that in February are only called upon for a proportionate part of the first year's subscription, and Fellows permanently residing abroad are exempt from one-fourth of the annual subscription. Honorary Fellows (limited to 50), consisting of persons eminent in Microscopical or Biological Science, are elected on the recommendation of five Ordinary Fellows and the approval of the Council. Ex-officio Fellows (limited to 100), consisting of the Presidents for the time being of any Societies having objects in whole or in part similar to those of the Society, are elected on the recommendation of ten Ordinary Fellows and the approval of the Council. The Council, in whom the management of the property and affairs of the Society is vested, is elected annually, and is composed of the President, four Vice-Presidents, Treasurer, two Secretaries, and twelve other Ordinary Fellows. The Meetings are held on the third Wednesday in each month, from October to June, at 20, Hanover Square, W. (commencing at 8 P.M.). Visitors are admitted by the introduction of Fellows. In each Session two additional evenings are devoted to the exhibition of Instruments, Apparatus, and Objects of novelty or interest relating to the Microscope or the subjects of Microscopical Research. The Journal, containing the Transactions and Proceedings of the Society, and a Summary of Current Researches relating to Zoology and Botany (principally Invertebrata and Cryptogamia), Microscopy, &c., is published bi-monthly, and is forwarded post-free to all Ordinary and Ex-officio Fellows residing in countries within the Postal Union. The Library, with the Instruments, Apparatus, and Cabinet of Objects, is open for the use of Fellows daily (except Saturdays), from 10 A.M. to 5 P.M. It is closed for four weeks during August and September. Forms of proposal for Fellowship and any further information, may be obtained by application to the Secretaries, or Assistant-Secretary, at the Library of the Society, 20, Hanover Square, W. |