THE ROYAL MICROSCOPICAL SOCIETY. The Society was founded in 1839 (incorporated by Royal Charter in 1866) for the communication and discussion of observations and discoveries tending to improvements in the construction and in the mode of application of the Microscope, or relating to subjects of Microscopical observation. The Society consists of Fellows, Honorary Fellows, Corresponding Fellows, and Associates. The Council is elected annually by the Fellows, and is composed of the President, four Vice-Presidents, Treasurer, two Secretaries, and twelve other Fellows. Candidates for admission as Fellows must be proposed by three or more Fellows, who must sign a Certificate of Recommendation stating the names, residence, description, and qualifications of the Candidate, of whom the proposer whose name stands first upon the Certificate must have personal knowledge. This Certificate is read at the next Ordinary (or Annual) Meeting, and the Candidate is balloted for at the succeeding Meeting. The Entrance Fee is 21. 2s., and the Annual Subscription (payable in advance on election, and subsequently on 1st January annually) is 21. 28. Future payments of the latter may be compounded for at any time by a payment of 211. Fellows elected in the months of October, November, or December will not be called upon for a second subscription during the succeeding year, and Fellows absent from the United Kingdom for a year, or permanently residing abroad, are exempted from one-half the usual subscription during absence. The Ordinary Meetings of the Society commence on the second Wednesday in October, and are continued on the second Wednesday in each month until June. They are held at King's College, Strand, W.C., and commence at 8 P.M. Visitors are admitted by the intro duction of Fellows. Twice in each Session an evening is devoted to the exhibition of objects and apparatus of novelty or interest relating to the Microscope or the subjects of Microscopical Research. The Journal of the Society, containing its Transactions and Proceedings, with other Microscopical information, is published bi-monthly, and is forwarded free of charge to all Fellows. The Library of the Society at King's College is open for the use of Fellows on Mondays, Tuesdays, Thursdays, and Fridays, from It is closed 11 A.M. to 4 P.M., and on Wednesdays from 7 to 10 p.m. during August. Forms of proposal for Fellowship, and any further information, may be obtained by application to the Secretaries, or to Mr. Walter W. Reeves, Assistant-Secretary, King's College, Strand, W.C. CHARLES STEWART, ESQ., M.R.C.S. | FRANK CRISP, ESQ., LL.B., B.A. Council. JOHN BADCOCK, Esq. WILLIAM A. BEVINGTON, ESQ. EMANUEL WILKINS JONES, ESQ. Assistant-Secretary. MR. WALTER W. REEVES. CONTENTS. No. I. (MARCH). I. The President's Address. By H. C. Sorby, F.R.S., P.G.S. (Plate I.) II.-Description of Professor Abbe's Apertometer, with Instructions for On the Orthonectida, a new Class of Animals parasitic on 1. On a New Coral, Stylaster stellulatus; and Note on Tubipora musica. By Charles Stewart, F.L.S., Hon. Sec. R.M.S. (Plate III.) .. II.—An Easy and Simple Method of Resolving the Finest-lined Balsamed Diatomaceous Tests by transmitted Lamplight, with special reference to Amphipleura pellucida. By Adolf Schulze, Glasgow III.-On a New Operculated Infusorian from New Zealand. By F. W. Hutton, Professor of Zoology in the University of Otago. (Woodcut.) 49 IV.—On a Large-angled Immersion Objective, without Adjustment Collar; with some Observations on "Numerical Aperture." By John Ware Stephenson, F.R.A.S., and Treasurer of the Royal Microscopical Society. (Woodcut.) V.-The Structure of the Coloured Blood-corpuscles of Amphiuma tridac- tylum, the Frog, and Man. By Dr. H. D. Schmidt, Pathologist of On an Ostracode Crustacean of a new Genus (Acanthopus), met A Microscopic Trap for a Rover High-angled Objectives for Histological Work New Process of Colouring Microscopic Preparations with a Picro- I. The Structure of the Coloured Blood-corpuscles of Amphiuma tridac- IV. On the Question of a Theoretical Limit to the Apertures of Micro- scopic Objectives. By Professor G. G. Stokes, M.A., D.C.L., LL.D., Sec. R.S., Lucasian Professor of Mathematics in the University of The Movement of Microscopic Particles suspended in Liquids A Test Object for Histologists.. On the Rhizopoda of the Salt Lake of Szamosfalva The Conversazione of the Royal Society on May 1.. The Soirée of the Chemical Society .. A French View of the Binocular Microscope A New Field for the Microscopist (the Flagellate Protozoa).. The Royal Microscopical Society of the Sandwich Islands 1.--On the Measurement of the Diameter of the Flagella of Bacterium termo: a Contribution to the Question of the "Ultimate Limit of Vision" with our present Lenses. By Rev. W. H. Dallinger. II. The Mastax-Framework in Melicerta ringens and Conochilus, described by F. A. Bedwell; with further Notes on these Rotifers. (Plates III.-Note on the Effect produced on P. angulatum and other Test Objects by excluding the Central Dioptric Beam of Light. By John Ware |