Physics and Chemistry. 421 
electrolysis in the ordinary way, the negative electrode being con- 
nected with mercury contained in a porous cup filled with the 
ammoniacal liquid, while the positive electrode dipp to mer- 
cury in an outer Sas vessel, also filled with ee solution of chlo- 
rid of ammoni urrent fro. Grove’s cells 
nia gas evolved to the hydrogen, ak placing the amalgam in dilute 
hydrochloric acid of known strength, and measuri ang Sn hydrogen 
evolved, The ammonia was then calculated from t 
the acid which it saturated. To free the amalgam from the ammo- 
nia contained in the solution, it was ing as with water ; hig Mg the 
and only 
? 
hem. Pharm., Suppl. Ba. vi, Heft 8, p. 346, Dec. 1868. 
