( 7 ) 
(5) Microscopical Optics and Manipulation. page 
Cox, J. D. — Diatom- Structure — The Interpretation of Microscopical Images (Fig. 74) 657 
Vanni, G . — On a new Method for the Measurement of the Eocal Length of Lenses or 
Convergent Systems 665 
Lekoy, C. J. A . — Proof of a simple Relation between the Resolving Power of an 
Aplanatic Objective of the Microscope and the Diffraction of the finest Grating 
which the Objective can resolve . . . . 665 
(6) Miscellaneous. 
Dr. Dallingeb’s Address to the Quehett Club 666 
The late Mr. John Mayall , Jr., Sec. R.M.S 673 
Carl W ilhelm von Naegeli 675 
List of all Patents for Improving the Microscope issued in the United States from 
1853 to 1890 . 676 
Newspaper Science 677 
/ 3 . Technique. 
Cl) Collecting: Objects, including: Culture Processes. 
Schultz, N. K . — Preparation of Nutrient Media 678 
Sacharow, N . — Preserving Malaria- Plasmodia alive in Leeches 679 
P astern acki, T. — Cultivating Spirillum Obermeieri in Leeches 679 
Kaufmann, P . — New Cultivation Medium for Bacteria 679 
Reichel’s Apparatus for Filtering Fluids containing Bacteria (Fig. 75) .. .. 680 
Winogradsky — Organisms of Nitrification and their Cultivation 680 
Line, J. E . — A Colony-counter (Fig. 76) 681 
D’Arsonval, A . — Filtration and Sterilization of Organic Fluids by means of liquid 
carbonic acid 682 
„ „ Apparatus for maintaining a Fixed Temperature 682 
(2) Preparing- Objects. 
Van der Stricht, O . — Examination of Embryonic Liver 683 
Schafer, E. A . — Preparation of Wing-muscles of Insects 683 
Rohde, E . — Preparation of Nervous System of Hirudinea 684 
Ward, H. B . — Mode of Investigating Sipunculus nudus 684 
Brauer, A . — Development of Hydra .. .. .. .. .. 684 
Hertwig, R —Study of Karyokinesis in Paramoecium 684 
Ward, H. B . — Method of Narcotizing Hydroids , Actinise , &c 685 
Beyerinck, M. W . — Method for Demonstrating the Formation of Acids by Micro- 
organisms 685 
Eiselsberg, A. von — Demonstration of Suppuration-Cocci in the Blood as an aid 
to Diagnosis 686 
Mann, Gustav — On a Method of Preparing Vegetable and Animal Tissues for 
Paraffin Imbedding, with a few Remarks as to Mounting Sections 686 
(3) Cutting, including Imbedding and Microtomes. 
Moll, J. W . — Sharpening Ribbon-Microtome Knives 689 
To preserve Edges of Microtome Knives . . 689 
(4) Staining and Injecting. 
Mann, G . — Staining of Chlorophyll 689 
Kaufmann, P . — New Application of Safranin 690 
Strauss — New Syringe for Hypodermic Injection 690 
Roux, G . — Colourability of Tubercle Bacilli 690 
Mallory, F. B. — Phospho-Molybdic Acid Hsematoxylin 690 
Mann, Gustav — Methods of Differential Nucleolar Staining 690 
(5) Mounting, including Slides, Preservative Fluids, &c. 
Aubert, A. B . — Reference Tables for Microscopical Work. III. Cements and 
Varnishes 692 
(6) Miscellaneous. 
Sternberg, G. M. — Coco-nut-water as a Culture Fluid 693 
Proceedings of the Society 
.. 694 
