( 9^1 ) 



INDEX. 



The Index includes the names of the Authors of all Papers, &c., printed in 

 the " Transaction:^," or noted in the " Summary " or Bibliography, as well 

 as those of the Designers of any Instruments or Apparatus descrilbed 

 under the head of " Microscopy." 



A. 



Abbe, E., On the Relation of Aperture 

 and Power in the Microscope, 790. 



Abbe's Camera Lucida, 119, 278. 



Condenser, new Form of, 319. 



Method of Testing Objectives, 120. 



Refractometer, 581. 



Spectro-polarizator, 435. 



Test-plate, 281. 



Abraham, P. S., 909. 



Absorption and Transpiration of Water 

 by Brand es in Winter, 872. 



of Roots, Selective Power of, 530. 



through the Epidermis of Aerial 



Organs, 93, 



Abstriction and Separation of Spores of 

 Fungi, 684. 



Abyssal Type of Orbitolites, 862, 



Acanthology of Desmostichous Echi- 

 nids, 849. 



Acari and Minute Insects, Mounting in 

 Balsam, 920. 



, Insects, &c., Capturing and Breed- 

 ing for Mounting, 911. 



, Polymorphism and Parthenogene- 

 sis in, 209. 



Accessories, Instruments, &c. See 

 Contents, xxii. 



Account, Treasurer's, 316. 



Acetic and Formic Acids in Plants, 243. 



Achenial Hairs and Fibres of Com- 

 positse, 385. 



Achlya and Saprolegnia, Fecundation 

 of, 247. 



Acids, Fatty, in Plants, 585. 



, , Preparing, 141. 



, Influence of, on Fermentation, 



and on the Development of Torula, 

 103, 



Actiniae and Bryozoa, Symbiosis of, 

 635. 



Actinosphserium Eichhornii, Gigantic, 

 379, 



, Observations on, 669, 



Activity of the Yolk during Impregna- 

 tion, 488. 



Acyclus and Dictyophora, Leidy's 



Genera of, 161. 

 Adams, J. M., 133, 547. 

 Adapter, Nose-piece, Curties', 572. 



, Matthews', 903. 



, Nelson's New, 572. 



, Watson's, 904. 



Address, The President's, 172. 

 Adhesive Substance, Use of, by Arthro- 



poda in Jumping, 646. 

 Adriatic Chitons, Organization of, 38. 

 Adventitious Roots of Monocotyle:lons, 



241. 

 Ady, J. E., 593, 612. 

 Aerial Branches of Psilotum, 394. 

 Organs, Abscjrption through the 



Epidermis of, 93. 

 Aeroscope and Aspirator, Portable 



Form of, 338. 

 African Fresh-water Sponges, 860. 

 Agaric, Phospliorescent, 101. 

 Agaricus (Mycena), epipterygius Scop. 



Germinating Spores of, 318. 

 Air and Soil, Bacteria of, 255. 

 and Water, Movements of Minute 



Particles in, 402. 

 , Carriage of Schizomycetes 



through, 106. 



, Freezing Objects from, 736. 



of Mountains, Organic Particles 



in, 542. 



, Removing, from Diatoms, 312. 



, Transmission of Bacteria from the 



Soil into, 541. 

 Albumen, Nuclein, and Plastin, 866. 

 Alcohol, Influence of, on the Develop- 

 ment of Torula, 104. 

 , Use of, for Mounting Lophopus 



crystallinus with tentacles exjDanded, 



469. 

 , Use of Solution of Sulphurous 



Oxide in, 185. 

 Alcyonsiria, Ciliated Groove (Siphono- 



glyphe) in Stomodseum of, 855. 



, Polymorphism of, 855. 



Aleurone and Tannin, 96. 

 Algse. See Contents, xxi. 



