862 



SEC. 19. EDUCATIONAL APPLIANCES. 



ground-glass screen ; set of six semi-lenses : movable 

 models to show refraction by convex und concave lenses. 

 6. For demonstrating the Laws of Chromatics : 



Set of coloured discs to iit whirling table ; achromatic 

 pair of prisms on jointed pillar. 



Matthew William Dunscombe, Bristol. 



4O92. Geography Teaching Apparatus : 



1. Physical and hypsometrical wall map of Belgium, 1 75 metre 

 by 1-60. 



2. Hypsometrical wall map of Europe in three colours, 2 metre 

 by 1 75 metre. 



3. Physical, political, and commercial wall map of the World, in 

 three colours, 2 metre by 1*75 metre. 



4. Oil cloth board map of Belgium and Europe for chalk 

 exercises, 1 30 metre by 1 75 metre. 



5. Hypsometrical submergible relief, for facilitating the study of 

 maps, painted plaster, 0*35 metre by 0'30. 



6. Typical landscape in relief, painted plaster, for studying geo- 

 graphical nomenclature, 0'70 metre by 0*60 metre. 



7. Several classical atlases (chromolithographic). 



8. Series of hartographical exercises, for the use of students. 



9. Manuals for masters and pupils. 



Alexis M. Gochef, Professor at the Normal School of 

 Carlsbourg (Belgian Luxemburg), 



4O92a. From Mottershead & Co., Manchester. 



Figure plates. 



Thick horse shoe magnets. 



Pair of magnets. 



Tate's air pump and receiver. 



Small air pump and receiver. 



Concave and convex mirrors. 



Bottle prism. 



Sets of phosphorescent powders. 



Copper drying oven, with regulator. 



Copper still and condenser. 



Liebig's condenser. 



French blast spirit lamp. 



Books of chemical labels . 



Electro-magnet. 



Galvanometer. 



Bladder frame and weights. 



Prism mounted on stand. 



Specimen of crystallized bismuth, 

 with glass shade. 



Combined Holtz and Berts th elec- 

 trical machine. 



Pair bismuth and antimony. 



Bar to show different expansion of 

 metals. 



Voltameter. 



Onsted's experiment. 



Tewsbury's reflecting polariscope 

 without Nicol's prism. 



Bobbin to show induction. 



Madgeburg hemisphere. 



Electroscope, with condenser. 



Vulcanite electrophorus. 



Kammerberg's air bath. 

 Set of apparatus and chemicals 

 according to Roscoe's primer, 



4092b. Apparatus from J. J. Griffin & Sons. 



Oil lamp furnace, complete. 

 Blowing machine for do., with tubing 



iron plate and bag. 

 Fireclay blast gas furnace with 

 Gas burner, 16 jets. 



Iron tripod stand. 



P. P. cylinder and crucible. 



Fireclay ventilator. 



cone. 



plates. 



