H. Wurtz onthe Mouth Blowpipe. ‘183 
acquir 
color, tesembling that produced by a mixture of solutions of 
ig of cobalt and chlorid of chromium, without any tinge of 
} Am. J. Science i 
ay 2], xxvi, 49. 
a“ the Sdeclorate of ferriferous glass by the addition of —, of _~ 
Tous int ‘Smakers’ soap,” is the action wholly due to the oop the fer- 
e neutralization 0: 
