( 4 ) 



Beoobd of Cdrebnt Researches, &c. — continued. 



FAGR 



Micrococcus prodigiosus ; .. 310 



Bacillus amyldbacter in the Carboniferous Period 310 



BaciUus of Leprosy 310 



Influence of the Electric Current on the Development of Bacteria .. .. 311 



Presence of Bacteria in the Air 311 



Bacteria and Insect' Larvse 312 



Destruction of Insect Pests by meant of Fungi 312 



Septic Organisms in Living Tissues 312 



Influence of Aromatic Decomposition-Products on certain Fungi .. .. 314 



Ferment of Nitrification 314 



Alopecia areata 314 



Microthelia and Didymosphseria 314 



Colours of Lichens 315 



Hypothallus of Lichens 315 



Structure and Classification of Scyionemacex 315 



Development of the Conceptacle of Fucacese 317 



Influence of Light on the Movements of Desmidiex and Swarmsporea . . 318 



Palmelline and Characine in Fresh-ioater Algse 319 



Structure of Spirulina 319 



Microscopy. 



Method of making Sections of Insects and their Appendages 320 



Collecting and Mounting Spiders^ Webs 320 



Preparing Sponges 321 



Collection of Fresh-water Bhizopods 322 



Cleaning Diatoms, Seaweeds, &c 322 



Separating Micro-organisms 322 



Pringsheim's Method of Investigation by concentrated Sunlight 323 



Microscopic Examination of Sands and Clays 324 



Cutting Bock-sections 325 



New Preservative Liquid 325 



Microphotographical Notes 326 



Micrometre or Micromillimetre 327 



JWMsewm Microscope (Figs. 16 and 17) 327 



Beck's Improved Microscope-Stand with swinging Substage (Plate IX.) . . 329 



Ahrens* Arrangement for using the Wenham Prism with High Powers .. 330 



Powell and Lealand's Improved Immersion Condenser (Figs. 18, 19, 20) .. 330 



Illumination witJi nigh Powers 331 



West's Universal-Motion Stage and Object-holder (Figs. 21 and 22) .. .. 331 



Modification of Stephenson s Safety Stage 332 



Deby's Growing Slide (Fig. 23) 333 



Dunning' s Turntable (Fig. 24:) 333 



Further Improvements in the Bivet-Leiser Microtome (Figs. 25, 26, 27, 28) 334 



Thin Covering Glass 337 



Befractive Index of Cover-glass 338 



Bibliography .. .. .. .. .. .. .. .. 339 



Prooeedinos of the SociETy .. .. .. .. .. .. 364 



