876 SEC. 19. EDUCATIONAL APPLIANCES. 



Heat. 



4333. Apparatus, glass, for demonstrating the Effect of 

 Steam. 



4334. Apparatus, glass balloon, and ring. 



E. LeyboloTs Successors, Cologne. 



Magnetism. 



4335. Simple Diving Element. 



4336. Double Diving Element. 



4337. Galvanoplastical Apparatus. 



4338. Pair of Carbon Points, with handles. 



4339. Apparatus for making Wires red hot. 



4340. Water Decomposition Apparatus. 



4341. Electro-magnet, with two binding screws. 



4342. Electro-magnetical Driving Machine. 



4343. Induction Apparatus, for extra current and secondary 

 current. 



4344. Bar Magnets. 



4345. Horse Shoe Magnet. 



E. LeybolcTs Successors, Cologne. 



Electricity. 



4346. Simple Electrical Machine. 



4347. Electrical Tuft. 



4348. Simple Gold-leaf Electrometer. 



4349. Fundamental Apparatus, according to Werners, for 

 friction electricity, magnetism, and galvanism. 



43 SO. Electrophorus, 210 mm. in diameter. 



4351. Electrical Shower of Balls. 



4352. Electrical Pistol. 



4353. Electrical Discharging Hod, 



4354. Simple Chime of Bells. 



4355. Ley den Jar, 156 mm. high. 



4356. Isolating Stool. 



E. Leybold's Successors, Cologne. 



