884 SEC. 19. EDUCATIONAL APPLIANCES. 



n. Apparatus for the electrolytical decomposition of the HC1, 

 H 2 O, and NH 3 ; consisting of V-shaped tube with platinum elec- 

 trodes, and iron stands. 



o. Reagent etagere for bottles ; with octagonal stopper, ribbon- 

 label, etched inscription, and formula on the stoppers. 



4501. Apparatus for demonstrating the Valency of 



Atoms, according to Kekule. 



4502. a. Cooler of Zinc, on stand. 



4503. I). Cooler of Brass. 



4504. c. Cooler of Glass, according to Hofmann. 



4505. a. Two Agate Mortars, with pestle, 65, 150 mm. 

 diameter. 



4506. b. Three Glass Mortars, with pestle, 60, 100, 120 

 mm. diameter. 



4507. c. Three Powder Mortars, of porcelain, with pestle. 



4508. d. Pill Mortar of Iron, 155 mm. diam. 



4509. c. Diamond Mortar. 



4510. ( ] . Diamond Mortar. 



4511. / Caustic Potash Form, of iron, 12 channels. 



4512. a. Filtering Pump, according to Bunsen. 



4513. b. Pump, according to Liebig, for drying organic 

 substances. 



4514. Alkalimetrical Apparatus. 



4515. a. Burette Stand, with eight movable burettes. 



4516. b. Four graduated Cylinders, 250-0, 500 '0, 

 1000-0, 3000 -Occ. 



4517. c. Mixing Bottle (cylinder), 1000 cc. 



4518. <l. Measuring Piston, two litres. 



4519. e. Measuring Piston, one litre with stopper. 



4520. /. Carbonic Acid Apparatus, according to Oechel- 

 hauser. 



4521. g. Carbonic Acid Apparatus, according to Riidorfr. 



4522. h. Carbonic Acid Apparatus, according to Scheibler. 



4523. Glass Gasometer. 



4524. Three different polished Retort-holders. 



4525. Four different Blow-pipes. 



4526. Two crucible Pincers. 



