SCHOOL APPARATUS. 



285 



SET OF APPARATUS FOR MAGNETISM AND 

 GALVANISM. PRICE $52 OR $70. 



13. Magic Circle SI 75 



14. Rodin Air and Helix 250 



15. Magnetizing Helix on Stnnd 2 50 



16. Galvanometer 3 00 



17. Telegraph Model 750 



18. Beam Engine $10, or 



20. Axial Engine 1000 



19. Wheel Engine 650 



21. Powder Cup 050 



$5325 



1. Bar-Magnet $075 



2. Horse-Shoe Magnet 1 00 



3. Star and Circular Plate 50 



4. Rolling Armature 1 00 



5. Y Armature 50 



G. Two Polished Iron Balls 50 



7. Iron Rods and Half Links 25 



8. Magnetic Swan and Fi-hes 50 



9. Miignetic Needle and Stand 75 



10. Galvanic Battery 2 50 



11. Magneto-Electric Machine 9 00 



12. Electro-Magnet 1 75 



Grove's Battery, 12 series of Zinc and Platina in Glass Cups, 

 arranged in a neat Black Walnut Case with Cover, with a set of 

 Conducting Wires, tipped with fine copper, steel, and iron wire, 

 watch-spring, &c., which burn with bright and varied colors, brilliant 

 scintillations, &c. ; a pair of Carbon Points, for producing the Gal- 

 vanic Light, and a Glass Globe, with wires tipped with platina, for 

 collecting the gases in the decomposition of water. Price of the Bat- 

 tery, according to size, $15, $18, and $20. 



