CHEMICAL APPARATUS. 



71 



Fig. 510. 



Fig. 511. 



(Fig. 510.) Small crucibles of Wedge- 

 wood's ware, with or without covers. 



Price, 25 cts. to 50 cts. 



Spirit Lamp. (Fig. 511.) A small 

 lamp which is fed by spirits of wine, 

 rather than by oil, producing a large 

 and hot flame, though little light and no 

 smoke ; the lamp being -used in chemical 

 operations, to heat retorts, test tubes, &c., 

 and not for the light it affords. Spirit 

 lamps are usually made of glass, with a 

 brass top to hold the wick, and supplied 

 with a cover, which fits over the top when 

 it is desirous to extinguish the flame. 



Price, 80.75. 



extra large, $1.00 and $1.25. 



Mortar and Pestles (Fig. 51 2.) are so 

 well known in every day use, that a de- 

 scription is scarcely necessary. The che- 

 mist requires for general use, one of glass, 

 Wedgewood's ware, or marble, with pestle 

 of the same description. They are used 

 to pulverize and mix minerals, earths, and 

 other substances ; as it is necessary in 

 analysing to reduce nearly all the sub- 

 stances to powder before you commence the analysis. 



Price, 50 cts. to $ 1.50. 



Spatulas. (Fig. 513.) These Fig. 513. 



are made of steel, and are used {_ ad j 

 to mix powders, to scrape out the 



contents of mortars and capsules* &c. Price, 38 cts. 



Fig. 512. 



Itetort Stands (Figs. 514 and 515, next page), with flat, 

 oval, or rectangular foot, rod twenty inches long, having 

 three rings two and a half, three and a quarter, and four 

 inches in diameter, with brass sockets and thumb screw. 



Price, $1.50. 



