ACTION OP CERTAIN CHEMICAL REAGENTS 205 
of oxide. No re-action took place in a solution containing 
above l-20,000dth. 
Arsenite of potassa produced a decided yellow precipi- 
tate with l-6000dth oxide in solution, but none with 
l-20,000dth. 
Iodide of potassium indicated the presence of l-4000dth 
oxide, but produced no action with l-30,000dth. 
A solution of hydrosulphuric acid, precipitated a solution 
containing l-35,000dth of oxide. 
Chloride of sodium produced a cloudiness in a solution, 
which contained only l-240,000dth. — Extracted by E. F. 
Teshmacher, from the Journal Jur Practische Chemie, No, 
1, 1841. 
Lond. Ed. and Dubin Phil. Mag, 
