1896.] Helium and the associated Gases exist in Minerals, 221 



generate the gas separately. It was made by heating cleveite, and 

 was deprived of carbon dioxide by potash and of water by calcium 

 chloride. An apparatus was then arranged consisting of a wide, 

 vertical glass tube, attached at its lower end to a strong canvas-cased 

 rubber tube connected with a reservoir of mercury which could be 

 raised to the ceiling of the laboratory. The upper end of the glass 

 tube was drawn out and sealed to a horizontal tube having three 

 vertical branches, each terminating in a bulb. The horizontal tube 



was also attached to the Sprengel pump and to a reservoir con 

 taining the gas, which could be shut off by a stopcock. Of the 

 three bulbs (A, B, and C) A contained 9 9 grams (1-68 c.c.) of 



