MISCELLANEOUS.. 885 



4527. One Dozen Funnels. 



4528. One Dozen Boiling Jars. 



4529. One Dozen Pistons. 



4530. Six Sets of Glass Bowls. 



4531. One Dozen of Woulff's Jars. 



4532. One Dozen Retorts. 



4533. Six Glass Stop-Cocks. 



4534. Six Separatory Funnels. 



4535. Six Potash Apparatus. 



4536. One Sulphuretted Hydrogen Apparatus. 



4537. One Deplacement Apparatus, according to Robi- 

 quet. 



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

 Rohrbeck). 



Technology. 



4538. Wooden Model of a Blast Furnace. 



4539. Wooden Model of a Shaft Furnace. 



4540. Wooden Model of a Fuddling Furnace. 



4541. Wooden Model of a Boiling and Stamping Mill. 



4542. Wooden Model of a Silver-Ore Refining Fur- 

 nace. 



4543. Wooden Model of a Double Roasting-Furnace 

 for Copper. 



4544. Wooden Model for demonstrating the Manu- 

 facture of Sulphuric Acid. 



4545. Wooden Model of a Glass Furnace (Siemens' 

 regenerative system). 



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

 Rohrbeck). 



4546. Apparatus for the graphical demonstration of the 

 Law of Descent. 



4547. Apparatus for determining the Linear Expansion 

 by Heat, by means of reading by mirror reflection. 



4548. Muller's Wave Disc. 



(a.) Stativ (stand). 



(b.) Portfolio with stroboscopical discs. 



4549. Some Drawings which Miiller used, in the years 1840 

 and 1850, in his lectures explanatory of apparatus. 



Physical Institute of the University of Freiberg, Baden 

 (Prof. Dr. A. Claus). 



