58 



assured them that there was really a very great diflference between the two 



Mr. Mclntire said that with regard to the binocular he believed the image 

 seen was formed upon the field lens of the eye-piece. 



Mr. Unwin exhibited and described an adaptation of the Nachet revolving 

 stage to the mechanical stage of his own microscope, which, he believed, would 

 be found of great utility. Having found the position of the stage in which it 

 was concentric with the objective, and fixed it there, he removed the brass stage 

 plate and substituted a Nachet stage . The advantages gained by being able to 

 do this were pointed out^ and it was suggested that it would be very useful to 

 microscopists if makers would determine the concentric position of the stage, 

 and mark it by drilling a hole through the plates when in that position, so that 

 it might be retained there, if required, by passing a pin through the hole. 



Mr. T. C. White brought for distribution some sticks of cement, made of 

 bees' wax and resin in equal parts, and melted together, and which he recom- 

 mended as being very useful in securing glass covers, &c., temporarily when 

 collecting ; it was readily melted by heat, and could be applied without further 

 preparation on the spot. 



The proceedings terminated with a conversazione, at which the following 

 objects were exhibited : — 



Spicules of Hyalonema mirabilis 

 Arrenurus viridis (?) 



Cellularia avieularia 



Bone of Hippocampus "> 

 Quartz Crystals ^ 



Hydra vulgaris (alive) ") 



Larva of Ephemera (alive) •> 



Snail Spawn on Water Cress 



Scales on leaf of Heretiera littoralis 



Arcyria 



Tracheal System of Flea 



Section of Spongilla fluviatilis and S. lacustris 

 Ctenoid Scales of Sole 



by Mr. Curties. 

 Mr. Fitch. 

 Mr. Golding. 



Mr. Guimaraens. 



Mr. Hainworth. 



Mr. Martinelli. 



Mr. Pett. 



Mr. Slade. 



Mr, Unwin. 



Mr. Waller. 



Mr. Geo. Williams. 



Attendance — Members, 80 ; Visitors, 12. 



May 10th, 1872. — Conversational Meeting. 



Dlatomacese, Fragilaria Capucina 



Section of leaf stalk Water Lily 



Head of a Vanessa Butterfly ... 

 Marine Life 



Spiders Hatching of themselves 

 Living Micro-lepidoptera 



Section of a Blue Pearl found in a Mussel 



Larvae of Gnat and 



Lagena sulcata ... 



Pond Life. Arcellum, Tabellaria, &c. 



Sections of Echinus Spines. Acrocladia trigouaria, &c. 



Section of Spinal Cord of Sheep, stained 



