IOWA ACADEMY OF SCIENCES. 
159 
will receive further attention. In (1) of the following 
experiments 85 c.c. of normal acid were used at 40 degrees, 
and in the others 20 c.c. of 2N were used in each case, and 
the acid was kept at about room temperature. 
IRON WEIGHED. 
HCl. FOUND. 
IRON CALCULATED. 
RESIDUE. 
1 . 
.1609 
.0518 
.1592 
.0011 
2. 
.2262 
.0699 
.2148 
.0046 
3. 
.3010 
.0949 
.2916 
.0006 
4. 
.3220 
.1023 
.3143 
.0014 
Action of Chloric Acid on Tin. 
The tin used was so-called pure tin obtained from 
Schuchardt, and the solution took place in glass stoppered 
bottles at room temperature. In the first experiment 25 
c.c. of the 2N. acid were used and the solution occupied 
about thirty minutes. In the second case 50 c.c. of N. acid 
were used and the action occupied several hours. Contrary 
to what might be expected very little tin oxide or stannic 
acid remained. In each case the residue, which did not 
increase on long standing, weighed .0022 gram. The solu- 
tion remained clear for a long time even after it had been 
diluted preparatory to titration. As in the case of iron, 
no hydrogen was set free and the tin went at once into the 
stannic condition, as shown by appropriate tests. 
1. .3084 grams of tin gave .0618 HC1, corresponding to .3027 grams tin. 
2. .3572 grams of tin gave .0721 HC1, corresponding to .3531 grams tin. 
Action of Chloric Acid on Copper. 
After the work on copper had been done there came to 
my notice the communication of Brochet on the solvent 
action of chloric acid on copper which appeared in Comptes 
Bendus January 25th of this year. His paper came into 
my hands after the next paragraph had been written . 
While granting to Brochet the priority in several partic- 
ulars, since he gave no analytical data, I deem it best to 
submit for record the paragraph as originally written. 
The action of chloric acid on copper offers no peculiari- 
ties. It is just what one in view of the foregoing would 
expect. The copper simply disappears, and this gives rise 
