1062 SEC. 19. EDUCATIONAL APPLIANCES. 



4510. e l . Diamond Mortar. 



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



4512. a. Filtering Pump, according to Bunsen. 



For filtration under high pressure with barometer scale and regulating cock 

 screwed on sheet iron. 



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

 substances. 



A small hand air pump with screw for fastening the same to the table. 



4514. Alkalimetrical Apparatus. 



4515. . 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. d. Measuring Piston, two litres. 



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



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

 hauser. 



For determining the per-centage of small quantities of carbonic acid con- 

 tained in coal-gas, by means of the absorption of potash-h'e. 



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



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



4523. Glass Gasometer, with brass fittings for use in 

 chemical laboratories. 



4524. Three different polished Retort-holders. 



4525. Four different Blow-pipes. 



These are of brass, nickel silver with veneered or inlaid platinum plates, 

 as well as arranged for direct use with gas. 



4526. Two crucible Pincers of steel and nickel silver. 



4527. One Dozen Funnels. 

 4523. One Dozen Boiling Jars. 



4529. One Dozen Pistons. 



4530. Six Sets of Glass Bowls. 



4531. One Dozen of WoulfPs Jars. 



4532. One Dozen Retorts. 



4533. Six Glass Stop-Cocks. 



4534. Six Separation Funnels, 



4535. Six Potash Apparatus. 



