MISCELLANY. 
239 
add f^ss of spirit of wine, add a few drops of strong sulphuric acid, 
and let it stand. After some time the ink assumes a beautiful green 
colour, and is rendered fit for use by the addition of a small quantity of 
sum aiabic.'— Ibid, from Jour, de Chim. 
Simple and easy process for quickly preparing the Iodide of Potassium, 
By M. J. H. Pypers. — The process of M. Pypers consists in slightly 
heating a mixture of 100 grains of iodine, 2 drachms of water. 75 
grains of carbonate of potassa, with 30 grains of iron filings. 
The mass is dried to redness. The resulting red powder is treated 
with water : then filter and evaporate to dryness. 
100 parts of iodine will furnish 135 parts of very white iodine of 
potassium, but slightly alkaline. — Chemist from Jour, de Chim. 
Note on the preparation of Scammony and its employment. By M. Wim 
mer. — The author recommends the following formula, as offering the 
greatest advantages: 
R Pure scammony resin 3 grammes. 
Venice soap 25 centigrammes . 
White sugar 275 u 
Mix, and reduce to fine powder. Then add by degrees— 
Powdered biscuit 24 grammes. 
Water a few drops. 
Triturate well, and carefully, to remove the powder that may be 
attached to the pestle, and then mix with the remainder of the powder. 
These powders are afterwards dried in the air, and divided into 
packets of 30 grammes each. 
3 grammes of the powder contains 30 centigrammes of scammony. 
The dose is from 50 centigrammes, which is sufficient to produce 
several stools in the case of an adult. For children of 15 years of age, 
the dose is reduced to 30 centigrammes, for those of seven or eight 
years to 20 centigrammes, and finally for children of two years of age 
to 10 centigrammes. 
These powders, in addition to their purgative properties, have the 
advantage of being an easily administered vermifuge. — Ibid. 
On the Preparation of Hyposulphite of Soda. By E. F. Anthon. — If 
dry sulphurous acid be conducted over powdered sulphuret of sodium 
(in a dry state) no action is observed • but if the sulphuret has previ- 
ously been moistened with about 20 per cent, of water, the sulphur- 
ous acid is then very quickly absorbed, provided the sulphuret con- 
tain an excess of carbon [kohle.) and was exposed only to such a tern- 
