Patten—Solutions of Hydrochloric Acid in Solvents. 335 
A second experiment (with! Si 2 01 2 was' undertaken, leaving out 
magnesium,, cobalt, copper, antimjony and tellurium, which were 
acted upon by the pure solvent. In this second experiment 
S 2 C1 2 did not act upon aluminum, chromium, manganese', zinc, 
iron, nickel, lead, cadmium, tin, bismuth, silver, gold, plat¬ 
inum, palladium, which metals also remained bright in the first 
experiment with Si 2 Cl 2 , as shown in Table I. When the HC1 
gas was run in, aluminum was coated white; zinc was slightly 
corroded white; cadmium showed a white crust; there was a 
red coating upon iron; tin was corroded white; and bismuth 
was darkened. The other metals remained bright. The solu¬ 
tion of HOI in S' 2 C1 2 shows a conductivity less than that of dry 
air. One hundred ten volts direct current across one milli¬ 
meter gave one and one-half volt deflection of a Jewell volt¬ 
meter, corresponding to a current of 0.000075 ampere. Cal- 
cite and witherite are not acted upon. 
Thionyl Chloride as Solvent. —Schuchardt’s SOCl 2 was 
treated as in method 1. The pure solvent acted upon magne¬ 
sium, coating it gray; aluminum, lead, and tin were coated 
white; iron, copper, bismuth, and antimony were coated black; 
arsenic was coated gray, and a very slight evolution of gas was 
noticed; tellurium was corroded; chromium, manganese, zinc, 
nickel, cadmium, silver, gold, platinum, and palladium re¬ 
mained bright. The solution of HOI in SoC : l 2 gave zinc a 
white coating, slightly darkened silver, and dissolved away the 
black coating which had been formed upon the iron by the 
SOCl 2 alone. Probably this coating was FeS and gave FeCl 2 
+ H 2 S. Very likely the silver was darkened by the H 2 S : thus 
formed. Ho further action upon any of the metals mentioned 
above was noticed. Both calcite and witherite were vigorously 
attacked with evolution of gas. 73 volts caused 0.00235 am¬ 
pere to flow through the S0‘01 2 above, with electrodes approxi¬ 
mately 5 mm apart and 1 cm square. 
All of the above experiments were carried out at room tem¬ 
perature (22° C) except the one with ethyl chloride, which 
necessarily was done at zero degrees C. on account of its low 
boiling point. With the exception of As01 3 and SO’OL, none 
