ARTICLE V. 



Description of an Apparatus for Deflagrating Carburets, Phosphurets, or Cya- 

 nides, in Vacuo or in an Atmosphere of Hydrogen, rvith an account of some 

 Results obtained by these and by other means; especially the Isolation of Cal- 

 cium. By Robert Hare, M. D. Read October 18, 1839. 



Upon a hollow cylinder of brass (A A) an extra air-pump plate (B B) is 

 supported. The cylinder is furnished with three valve cocks, (D D D,) and 



VII. — 



