150 
IOWA ACADEMY OF SCIENCES. 
1. 5 c.c. of a solution of chloric acid gave 1.0639. HC10 3 . 
2. 5 c.c. of chloric acid gave 1.0619 HC10 3 . 
The same solution of pure chloric acid titrated with standard 
barium hydroxide gave in 5 c.c. 1.0665 HC10 3 . 
CALCU- 
LATED 
3. 0.4595 grams KC10 3 gave 0.3158 HC10 3 . 
4. 0.6709 grams KC10 3 gave 0.4628 HC10 3 . 
5. 0.8200 grams KC10 8 gave 0.5731 HClOg. 
6. 1.2744 grams KC10 3 gave 0.8778 HClOg. 
7. 0.3350 grams KBrOg gave 0.2605 HBrOg. 
8. 1.0983 grams KBr0 3 gave 0.8460 HBrO s . 
.3165 
.4622 
.5718 
.8778 
.2585 
.8478 
The method above described seems to have some advant- 
ages. It is extremely simple. It can be carried out at 
room temperature, avoiding the danger of loss of hydro- 
chloric acid by heat. In the reduction and the prepara- 
tion of the solution for titration are necessary only iron 
and pure sulphuric acid and nitric acid which are always 
at hand in every laboratory, and no filtering or other oper- 
ations likely to occasion loss of chlorine or loss of time are 
required. 
Iowa College, Grinnell, Iowa. 
April 11, 1904. 
THE ACTION OF CHLORIC ACID ON METALS. 
BY W. S. HENDRIXSON. 
In the course of my work a year ago on Silver as a Re- 
ducing Agent, in which the action of finely divided silver 
on chloric, iodic and chromic acids was studied quantita- 
tively, there was occasion to study the literature relating 
to the action of chloric and related acids on other metals. 
It soon appeared clear that the amount of information to 
be gained about the action of chloric acid in particular, on 
the metals was very meager, and it appeared also that there 
were several errors, whose origin in most cases could not 
