BARIUM, STRONTIUM, AND CALCIUM. 41 



By the same means I froze a mass of the amalgam of ammonium as large as 

 the palm of my hand, so as to be quite hard, tenacious and brittle. The mass 

 floated upon the mercury of my mercurial pneumatic cistern, and gradually 

 liquified, while its volatile ingredients escaped. 



When the freezmg of the amalgam was expedited by the addition of hydric 

 ether, the resulting solid effervesced in water, evolving ethereal fumes. This 

 seems to show that a portion of this ether may be incorporated with ammo- 

 nium and mercury, without depriving the aggregate thus formed of the cha- 

 racteristics of a metallic alloy. 



VII. — L 



