882 SEC. 19. EDUCATIONAL APPLIANCES. 



4476. Drying Disc, according to Fresenius, for agricultural 

 chemical purposes, with thermometer. 



4477. One Burner to the same. 



4478. Burner, Blast, and Lamp. 



4479. . Eolipile, of brass plate. 



4480. b. Berzelius' Lamp, on porcelain plate. 



4481. c. Lamp, according to Mitscherlich. 



4482. d. Simple Burner, with glass tube. 



4483. e. Bunsen's Jet Burner, uni-radiating, with case for 

 illuminating flame. 



4484. f. Bunsen's Burner, with chimney, and fork-shaped 

 holder. 



4485. g. Bunsen's Burner, with star-ring, chimney, and 

 blow-pipe apparatus. 



4486. h. Finkner's Burner, with gas and air regulator. 



4487. i. Finkner's Burner, with star-ring and chimney. 



4488. k. Griffin's Burner. 



4489. /. Burner, according to the Viennese model. 



4490. m. Double-radiating Jet Burner. 



4491. -,!. Treble-radiating Jet Burner. 



4492. o. Iserlohn Gas-stove Burner, with one emission 

 ring. 



4493. p. Iserlohn Gas-stove Burner, with double emission 

 ring. 



4494. q. Blow-pipe-table Adjustment, according to 

 Magnus. 



4495. r. Blow-pipe-table Adjustment, with two stop- 

 cocks on stativ, and porcelain plates, according to Rohrbeck. 



4496. s. Apel's Stove. 



4497. t. Universal Stand, of iron, with Finkner's patent 

 burner, four rings, and three retort-holders. 



4498. u. Iron Filtering Stand, with three rings. 



4499. v. Schellbach's Retort-holder. 



W. J. Rohrbeck, J. F. Luhme $ Co., Berlin (Dr. Herm. 

 Pohrbeck). 



