( ^-'91 ) 



INDEX TO VOLUME II. 



A. 



<;, E., on new Methods for Improv- 

 ing Spherical Correction, applied to 

 the Construction of AVide- angled 

 Object-glasses, 812. 



on Stephenson's System of Homo- 

 geneous Immersion for Microscope 

 Objectives, 256. 



Abbe's Experiment on Pleurosigma 

 angulatum. Note on, 675. 



Abnormal Sexual Organs in the Horse- 

 Leech, 156. 



Abortion of the Hairs on tlie Legs of 

 certain Caddis-flies, &c., 412. 



Absorption, Cutaneous, of Helix poma- 

 tia, 856. 



, Decrease of Power of, in Branches 



dipped in Water, 913. 



of Kain and Dew by the green 



parts nf Plants, 913. 



of Water by the Lamina of Leaves, 



750. 



Acari, British (Orihatidaj), 76. 



, Genera of, 71 '2. 



Acarina found parasitic in the CelUdar 

 Tissues and Air-sacs of Birds, 415. 



, New, 295. 



, on some Genera of, 417. 



Accounts, Treasurer's, for 1878, 218. 



Accuracy, Limits of, in Measurements 

 with the JMicroscope, 473. 



Acephala, Blo^d-cells of, 398. 



Achromatic Condenser, Improved, 328. 



Lenses, 173. 



Acid. Osmic, on some Applications of, 

 to Micrdscopic Purposes, 3S1. 



Acids, Chromic and Osmic, Em|iloymi nt 

 of IMixtures of, for Histological Pur- 

 poses, 144. 



Acinetffi and VorticclL'e, 438. 



, lleseiircl.es on, 438. 



Actinozoa, Classification and Phylogeny 

 of, 5S1. 



Adams' Measuring Polariscope, 774. 



Address, the President's, 113. 



Adoi)tion of an Ant-queen, 868. 



AdulteratioBi of Currant Jelly with 

 Diatoms, 938. 



Adventitious Buds in Ferns, 597. 



Aerating Apparatus of Sea -water 

 Aquaria, Improvement in, 326. 



VOL. n. 



Affinities of the Polyzoa, 553. 



Agaricus melleus, Polymorphism of, 

 455. 



Air-bubbles, means of avoiding, in 

 Preparation of Diatoms, 616. 



Air, Eemoval of, from Microscopic 

 Specimens, 150. 



Air-sacs and Celhdar Tissue of Birds, 

 Acarina found parasitic in, 415. 



Albuminoids, Di£;e8ti(m of, by Inverte- 

 brata, 274. 



Alciopid, New, 886. 



Alcoholic Fennentation, 82, 187, 453. 



Alcyonaria, Skeleton of, 279. 



Alder, Root of. Excrescences on, 929. 



Alectona Millari, New Species of Ex- 

 cavating Sponge, 493. 



Algse. See Contents, xix. 



American Association for the Advance- 

 ment of Science, Microscopy at, 95. 



ffidogoniacese, 935. 



Amoeboid Epithelia, 852. 



Amphineura, Neomenia and the other, 

 404. 



Amphion and Polychcles, 563. 



Amphiplenra pellucida, Observations 

 suggested by the Study of. Mounted 

 in Canada Balsam, by Lamplight 

 and Sunlight, with various Objec- 

 tives, 663. 



Amphipoda, Observations on, 715. 



Amiilification of Optical Instruments, 

 Mtasurenient oi, 184. 



Ampull iria, Kespiratory Apparatus of, 

 706, 857. 



Amylaceous Substance in Fungi, 

 supposed, 757. 



Anal Glands and Poison Apparatus of 

 Ants, 142. 



Plates of Echinocidaris, 890. 



Angiosperms and Gymnosperms, 905. 



, Division of PoUen-gr.iin in, 746. 



, Embryo-sac of, Development of, 



903. 



Angle of Aperture of Objectives, 

 Note on Mr. Wen ham's Paper on the 

 Measurement of, 270. 



of Aperture of Objectives, Mr. 



Wenliam on, 983. 



of the Optic Axes of Crystals, 



Apparatus for Determining, with tlie 

 Microscope, 1I>1. 



3 u 



