336 Wisconsin Academy of Sciences, Arts, and Letters. 
of tlie above solvents or solutions conduct electricity, rather 
they are most excellent insulators. It is established beyond 
question that chemical action may and does take place in solu¬ 
tion at ordinary temperature without the presence of moisture 
and without concomitant electrolytic conduction. Contact of 
one metal with another has no effect upon any of the above 
actions. I he colors of the coatings formed upon the various 
metals indicate that the chlorides of the metals have been 
formed. In many cases the formation of a protective chloride 
coating causes the corrosion of the metal to cease. 
TABTjE I. 
Table I contains a summary of the results obtained in this 
research. At the topi of each column is given the formula for 
the solvent used. Above this formula is given the number of 
the experiment with that solvent. The symbols placed in the 
squares directly below the solvent formula denote what action 
the pure solvent had upon the metal which stands in the hori¬ 
zontal column with this square. The symbols in the squares 
below the formula HCl indicate the action of the solution of 
HOI in that solvent upon the respective metals. 
The following symbols are used to indicate what action took 
place upon the metal:— 
Square left blank — Metal remained bright. 
C = Metal corroded; no gas given off. An ! after the 0 
means that the action is instantaneous. 
W u White. B — Black. R = Red. D — Darkened. 
G = Gray. Pk Pink. I If Corrosion increased. 
T — Slight tarnish. HP = Ho further action. 
P = Metal seems to be plated upon. — = Metal not present. 
X = Solvent is broken down. 
H — Bubbles of gas given off. 
The subscripts H a , H/?, H r , etc., indicate the order of vio¬ 
lence of action, H^, being most violent and Hj the least. The 
estimation was made by my eye, and is merely my judgment 
as to the rate at which gas was evolved. 
