1008 SEC. 19. EDUCATIONAL APPLIANCES. 



400 Oak. Pith Balls with Insulating Threads. 



4OOOal. Insulating stand for Insulating Threads. 



40OOam. Proof Plane [glass]. 



4OOOan. Proof Plane [sealing wax]. 



40OOao. Proof Plane [ebonite]. 



4000ap. Insulated Flannel Rubber. 



4OOOaq. Gold Leaf Electroscope. 



4000ar. Shellac Bod. 



4OOOas. Flannel Rubber for Shellac Rod. 



4OOOat. Sealing Wax. 



40OOau. Flannel Rubber for Sealing Wax. 



40OOav. Cylindrical Conductor on Insulating Stand. 



40OOaw. Conical Conductor on Insulating Stand. 



40OOax. Spherical Conductor with Insulating Thread. 



4000ay. Spherical Conductor with Insulating Thread. 



4OOOaz. Insulating Stand for Spherical Conductor. 



4000ba. Insulating Stand for Spherical Conductor. 



4OOObb. Insulating Plate. 



4OOObc. Condenser. 



4OOObd. Fulminating Plate. 



4OOObe. Bennett's Multiplying Condenser. 



4OOObf. Leyden Jar Discharger. 



4OOObg. Oval Conductor on Stand. 



400Obh. Electrophorus Cover. 



400Obi. Reversible Net. 



VOLTAIC ELECTRICITY. 



4OOObj. Coil of Wire on Glass Tube. 

 4OOObk. Zinc and Copper Plates. 



