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MMiscellanies. 185 
gled with starch paste, and then with a solution of iodic acid, imme- 
diately give a blue color. 
In the reciprocal action of iodic acid and morphine, the former is 
evidently decomposed, since a large quantity of the iodine is set free. 
The mixture, diluted with water, remains of a red brown, with a 
deposit of the same color, which, after exposure to the air, passes 
with the fluid to a clear yellow, from the volatilization of the iodine. 
The supernatant fluid, by spontaneous evaporation, yields a yellow 
powder of a crystalline aspect.—Annales de Chim., Fev. 1839. 
3. Preparation of Crystallized Iodic Acid.—The following pro- 
cess is given by Serullas as the best method of obtaining this acid. 
Make a solution of iodate of soda; heat it to ebullition during twelve 
or fifteen minutes with sulphuric acid in excess, (at least double the 
quantity necessary to saturate the soda,) and filter. The fluid, suffi- 
ciently concentrated, being left to itself in a stove at 20° to 25° cent. 
furnishes in a short time a crystalline mass, which is to be washed 
with a little water, placed on bibulous paper, and dried in a stove. 
When pressed, it divides into small brilliant crystals. The iodic acid 
thus obtained is pure ; the process is easy ; a portion of it, heated to» 
redness in a tube ought to disappear entirely. If it can retain traces 
Ofiodate of soda, it should be dissolved a second time with addition 
of sulphuric acid and recrystallized. 
Crystallized iodic acid is very soluble in water ; but very sparingly 
in alcohol, which precipitates it from water. It undergoes no notable 
alteration in the air, nor does it attract moisture very sensibly ; it has 
4 peculiar odor, in which that of iodine cannot be mistaken. ‘The 
author has not observed that it attacks gold, as has been said. He 
has ascertained that Sir H. Davy was mistaken in several points with 
‘Tegard to this acid, probably from the small quantity with which he 
€xperimented. The substances which Davy designates by the names 
of iodo-sulphuric acid, iodo-nitric acid, and iodo-phosphoric acid, and 
which he considers as durable acids in definite proportions, do not ex- 
ist— Idem, 
~ 4. On fuming Nitric Acid, by M. Mitcherlich—The temperature 
of the laboratory being at -- 10° cent. he heated very gently in a re- 
tort placed on a sand bath, 10 to 20 Ibs. of fuming nitric acid. A sia 
long tube was adapted to the retort surrounded with chloride of cal- 
cium and snow, and joined to a receiver and a pneumatic tube. ahaa 
the latter tube no gas was disengaged. In the receiver a liquid was 
Condensed which formed two strata, which remained distinct after ag- 
es much like oil and water. The lightest fluid, when separated, 
24 
ou. XX.—No. 1. 
