1026 SEC. 19. EDUCATIONAL APPLIANCES. 



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

 models to show refraction by convex and concave lenses. 

 6. For demonstrating the Laws of Chromatics : 



Set of coloured discs to fit whirling table ; achromatic 

 pair of prisms on jointed pillar. 



Mattheio William Dunscombe, Bristol. 



4092. 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. Gochet, Professor at the Normal School of 

 Carlsbourg (Belgian Luxemburg}. 



4092a. From Mottershead & Co., Manchester. 



Figure plates. j Specimen of crystallized bismuth, 



Thick horse shoe magnets. with glass shade. 



Pair of magnets. I Combined Holtz and Bertsch elec- 



Tate's air pump and receiver. trical machine. 



Small air pump and receiver. | Pair bismuth and antimony. 



Concave and convex mirrors. j Bar to show different expansion of 



Bottle prism. metals. 



Sets of phosphorescent powders. Voltameter. 



Copper drying oven, with regulator. 

 Copper still and condenser. 

 Liebig's condenser. 



Oersted's experiment. 

 Jewsbury's reflecting polariscope 

 without NicoFs prism. 



French blast spirit lamp. j Bobbin to show induction. 



Books of chemical labels. Madgeburg hemi sphere. 



Electro-magnet. Electroscope, with condenser. 



Galvanometer. 



Bladder frame and weights. 



Prism mounted on stand. 



Vulcanite electrophorus. 

 Rammelsberg's air bath. 

 Set of apparatus and chemicals 



according to lloscoe's primer. 

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



Oil lamp furnace, with Griffin's 

 blowing machine for the fusion of 

 metals at high temperatures. 



Gas burner, 16 jets, and a selection 



of internal fittings. 

 Iron tripod stand. 



Griffin's patent blast gas furnace, P. P. cylinder and crucible. 

 with . I Fireclay ventilator. 



