( 981 ) 



INDEX. 



Abbe's Apparatus for demonstrating the 

 Increase of Eadiation in Media of 

 higher Eefractive Index than Air, 

 526. 



new Apertometer, for measuring 



very large apertures, 978. 



Stereoscopic Eye-piece, 298, 689. 



Abbe, E., Conditions of Ortlioscopic and 



Pseudoscopic Effects in the Binocular 



Microscope, 203. 

 , Note on a Fluid for Homogeneous 



Immersion, 366. 

 ■ , On the Estimation of Aperture in 



the Microscope, 388. 



Theory of Microscopical Vision, 



3i8. 



Absorptive and Diffusive Power of 

 Leaves, 270. 



Organs of Batrachospermum, 



646. 



Acalephse, American, 746. 



Acanthacese, Secreting Intercellular 

 Passages and Cystoliths in, 622. 



Acarida, Observations on, 885. 



Acarus, Species of, believed to be un- 

 recorded, 212. 



Accessories, Instruments, &c. See Con- 

 tents, XXV. 



Accounts, Treasurer's, 368, 371. 



Acineta dibdalteria. New Species of 

 Marine Infusorian from the Gulf of 

 Genoa, 472. 



Acoustic Nerve, True Origin of, 18. 



Acraspedota, Organization and Classi- 

 fication of, 608. 



Address, The President's, 180. 



Adjustment, Correction, Oil-immersion 

 Objectives with, 519. 



, Fine, by the Eye-piece, 816. 



, New Fine, 519. 



Adoxa Moschiitellina, Anatomy of, 267. 



Adriatic, Amphipoda of, 453. 



Crustaceans Parasitic on Fish, 



456. 



, Eemarkable Vital Phenomenon 



in, 785. 



Adulterations in Flour, Mode of De- 

 tecting by the Microscope, 962. 



Advantage of the Binocular, 835. 



Adventitious Buds of Ferns, Apical 

 Cell in, 635. 



^cidium columnare, 83. 



JSquorea Forskalea, 747. 



.lEthalium septicum. Composition of 

 the Protoplasm of, 283. 



Aeroconiscope, Dr. Maddox's Modified, 

 134. 



Aeroscopes, 361. 



Affinities and Structure of Carboniferous 

 Myriapoda, 598. 



Ahrens' Erecting Binocular Micro- 

 scope, 651. 



Air, Action of Ozone on Germs con- 

 tained in, 781. 



Albumen in Plants, Transformation of, 

 271. 



Albuminoids of the Fig, 918. 



Albuminiparous Glands in Amphibians 

 and Birds, 577. 



Alcohol, Transferring Sections from, to 

 another Fluid, 953. 



Alg£e. See Contents, xxiii. 



Algological Notes, 929. 



Alpine Flowers, Fertilization of, 624. 



Alternation of Generation in the 

 Cynipidse, 443. 



of Generations in some Uredinese, 



83. 



Altitude, Variation of the Colouring 

 Matters of Flowers with, 77. 



American Acalephse, 746. 



Cephalopoda, 724. 



Gymnosporangia, or "Cedar- 

 apples," 774. 



(North) Algse, 782. 



Amosbse, Production of, 473. 



Ammonites, Genealogy of, 228. 



Amphibians and Birds, Albuminiparous 

 Glands in, 577. 



Amphipleura pellucida by Reflected 

 and Transmitted Light, 363, 373. 



Amphipoda, Development of, 599. 



of tlie Adriatic, 453. 



Amphipoda, Australian and Tasma- 

 nian, 241. 



Amplifications, High, 127, 679. 



Anaesthetics, Action of, on the Sensi- 

 tive Organs of Plants. 917. 



Anatomy of Plants, The Microscope 

 and the Origin of, 709. 



